REFERENCE NO: AW000-34-0010, Rev 08

BOMBARDIER CHALLENGER 850 · Service Bulletins

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Overview

This document is a service bulletin for the Bombardier Challenger 850, addressing the risks associated with 5G C-Band interference on radio altimeters. It provides guidance on compliance with FAA and TCCA airworthiness directives regarding the operation of aircraft in the presence of 5G technology.

All Challenger models are affected by 5G interference on radio altimeters.
Operators must revise the AFM by June 30, 2023, to include new limitations.
Radio altimeter tolerant aircraft must have specific equipment installed by February 1, 2024.
The FAA has defined 'radio altimeter tolerant' and 'non-radio altimeter tolerant' aircraft.
No actions are required for radio altimeter tolerant airplanes under the new directives.
All Bombardier aircraft are currently classified as non-radio altimeter tolerant.
Operators must inform flight crews of new limitations after AFM revisions.
The document includes references to multiple FAA and TCCA directives.

Document

Source

Originally published by realaviation.ca. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.

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Document details

Type: Service Bulletins
Year: 2023
File size: 521 KB
Publisher: realaviation.ca
Language: en

About this document

What is the REFERENCE NO: AW000-34-0010, Rev 08?

The REFERENCE NO: AW000-34-0010, Rev 08 is a service bulletins for the BOMBARDIER CHALLENGER 850, dated 2023.

Where does the REFERENCE NO: AW000-34-0010, Rev 08 come from?

This copy of the REFERENCE NO: AW000-34-0010, Rev 08 was originally published by realaviation.ca and is hosted on Sprinkle as a free, searchable reference copy.

What year was the REFERENCE NO: AW000-34-0010, Rev 08 published?

The REFERENCE NO: AW000-34-0010, Rev 08 — the BOMBARDIER CHALLENGER 850 service bulletins on file — is dated 2023.

Documentation completeness

1/7

Most owners only have the POH. Here's the essential set for the BOMBARDIER CHALLENGER 850.

Pilot's Operating Handbook / AFM
Checklist
Maintenance Manual
Parts Catalog (IPC)
Systems & Wiring
Service Bulletins on file
Type Certificate (TCDS)

In this document

Introduction

Revision 8 informs operators about FAA letters and TCCA AMOC related to 5G interference on radio altimeters.

Description

The FAA AD 2023-10-02 addresses the impact of 5G C-Band telecommunications on radio altimeter functionality.

Action

Operators must comply with FAA and TCCA directives regarding AFM revisions and equipment installation.

Definitions

Clarifies the definitions of radio altimeter tolerant and non-radio altimeter tolerant airplanes.

AFM Revision Requirements

Details the necessary AFM revisions for non-radio altimeter tolerant airplanes by June 30, 2023.

Compliance Guidance

Provides guidance on compliance with FAA and TCCA directives for operators.

Safety notes

Operators must revise the AFM to include limitations on operations requiring radio altimeter data.
Non-radio altimeter tolerant airplanes must comply with specific AFM revision requirements.
Failure to comply with the directives may affect aircraft operation in 5G environments.

Full document text

REFERENCE NO: AW000-34-0010, Rev 08 ATA: 34-44 EFFECTIVITY: All Challenger models All Global models SUBJECT: 5G – Risk of Potential Adverse Effects on Radio Altimeters AW000-34-0010  Basic issue: Dec 15, 2021  Revision 08: September 29, 2023 Page 1 of 12 1. REFERENCES: 1.1. Federal Aviation Administration (FAA) Airworthiness Directive (AD) 2023-10-02 – Transport and Commuter Category Airplanes https://www.federalregister.gov/documents/2023/05/26/2023-11371/airworthiness-directives- transport-and-commuter-category-airplanes 1.2. Transport Canada Continuing Airworthiness (TCCA) Airworthiness Directive (AD) CF-2023- 46 Airworthiness Directive CF-2023-46 - Navigation – Aeroplane – Prohibition of Operations Requiring Radio Altimeter When Operating in the Presence of 5G C-Band Wireless https://wwwapps.tc.gc.ca/Saf-Sec-Sur/2/cawis-swimn/AD_dl.aspx?ad=CF-2023- 46&cn=CF&ft=pdf&l=E 1.3. Flight Operation Notifications (FON) Manuals AVNC−038 (Global) and FON AVNC−002 (Challenger) 5G − Risk of Potential Adverse Effects on Radio Altimeter 1.4. Advisory Wire AW700-34-0904 - Airplane Flight Manual (AFM) Limitations and Master Minimum Equipment List (MMEL) Item Prohibition in the Presence of 5G C-Band Wireless Broadband Interference 1.5. Advisory Wire AW700-34-0907 - Airplane Flight Manual (AFM) Limitations and Master Minimum Equipment List (MMEL) Item Prohibition in the Presence of 5G C-Band Wireless Broadband Interference The references above are posted and available on the Bombardier Customer Portal: https://my.businessaircraft.bombardier.com/ AW000-34-0010  Basic issue: Dec 15, 2021  Revision 08: September 29, 2023 Page 2 of 12 1.6. Mitsubishi Heavy Industries Regional Jet (MHI RJ) – Challenger 850 Flight Operation Note (FON) no. 34-012, 5G − Potential Unreliable Operation of Radio Altimeter Caused by 5G C- Band Interference The reference above is posted and available on the MHI RJ Customer Portal: flyMHIRJ 1.7. FAA letter No. 720-23-00155 - BD-700-1A10/1A11 (Global 5/6), BD-100-1A10 (CH300/350), CL-600-2B16 (CH605/650) Compliance to FAA AD 2023-10-02 Radio Altimeter Tolerant Airplane Definition 1.8. FAA letter No. 732-23-00175 - BD-700-2A12 Compliance to FAA AD 2023-10-02 Radio Altimeter Tolerant Airplane Definition 1.9. AMOC No. AARDG-2023/A41 - Blanket Alternative Means of Compliance (AMOC) with Transport Canada Civil Aviation (TCCA) Airworthiness Directive (AD) CF-2023-46 CF-2023-46-E.PDF (tc.gc.ca) 1.10. FAA AD NPRM Docket # FAA-2022-1647-0095 Regulations.gov 2. INTRODUCTION: Revision 8 of this Advisory Wire (AW) is to inform the operators that the FAA released the letter No. 720-23-00155 (Ref. 1.7) and No. 732-23-00175 (Ref. 1.8) and also to introduce the TCCA AMOC No. AARDG-2023/A41 (Ref. 1.9). To help operators, this AW provides guidance through the different sections of the FAA AD 2023- 10-02 (Ref. 1.1) and TCCA AD CF-2023-46 (Ref. 1.2). 3. DESCRIPTION: The FAA issued AD 2023-10-02 (Ref. 1.1) effective May 26, 2023, to address the expanded use of 5G C-Band telecommunications (3.7-3.98 GHz) which is just below the radio altimeter systems operating frequency (4.2-4.4 GHz). The determination was made that radio altimeter systems cannot be relied upon to perform their intended function if they experience interference from adjoining wireless broadband operations. AW000-34-0010  Basic issue: Dec 15, 2021  Revision 08: September 29, 2023 Page 3 of 12 The FAA AD 2023-10-02 (Ref. 1.1) is adding definitions for “radio altimeter tolerant” and “non- radio altimeter tolerant” airplanes to 5G C-Band interference, adding requirements for US- registered airplanes operating under 14 CFR Part 121 to install radio altimeter tolerant equipment before February 1st 2024, and requires revising the limitations section of the AFM on or before June 30th, 2023, to incorporate limitations prohibiting certain operations requiring radio altimeter data, due to the presence of 5G C-Band interference. In response to Bombardier’s request, the FAA issued letter No. 720-23-00155 (Ref. 1.7) and respectively No. 732-23-00175 (Ref. 1.8) which confirms that Bombardier BD-700-1A10/1A11 (Global 5/6), BD-100-1A10 (CH300/350), CL-600-2B16 (CH605/650) aircraft with External Bandpass Filter installed and BD-700-2A12 (Global 7500) aircraft equipped with Radio Altimeter P/N: 822-0615-257, meet the requirement to be a “radio altimeter tolerant” aircraft as defined in paragraphs (g)(1)(i) and (g)(1)(ii) of AD 2023-10-02 (Ref. 1.1)”. The TCCA AMOC No. AARDG-2023/A41 (Ref. 1.9) issued on July 11, 2023 is applicable only to Canadian registered airplanes and confirms the acceptability of any FAA approved AMOC with FAA AD 2023-10-02 (Ref. 1.1) (if granted*) for use as an AMOC with Transport Canada AD CF- 2023-46 (Ref. 1.2). Note*: Please note that no AMOC is deemed required by Bombardier for operators updating their AFMs to the revisions referenced in Table 2. These revised AFMs meet the intent of the FAA AD 2023-10-02 (Ref. 1.1). AW000-34-0010  Basic issue: Dec 15, 2021  Revision 08: September 29, 2023 Page 4 of 12 4. ACTION: FAA AD 2023-10-02 (Ref. 1.1) TCCA AD CF-2023-46 (Ref. 1.2) Bombardier Guidance Regarding Compliance “(g) Definitions (1) For purposes of this AD, a “radio altimeter tolerant airplane” is one for which the radio altimeter, as installed, demonstrates the tolerances specified in paragraphs (g)(1)(i) and (ii) of this AD, using a method approved by the FAA. No actions are required by this AD for radio altimeter tolerant airplanes. (i) Tolerance to radio altimeter interference, for the fundamental emissions (3.7–3.98 GHz), at or above the power spectral density (PSD) curve threshold specified in figure 1 to paragraph (g)(1)(i) of this AD. Figure 1 to paragraph (g)(1)(i)— Fundamental Effective Isotropic PSD at Outside Interface of Airplane Antenna “Corrective Actions: Part I - Definitions For the purposes of this AD, the following definitions apply: A. A radio altimeter tolerant aeroplane

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is one for which the radio altimeter, as installed, demonstrates the tolerances specified in Part I paragraphs A.1 and A.2. of this AD, using a method approved by the FAA or Transport Canada. No actions are required by this AD for radio altimeter tolerant aeroplanes. 1. Tolerance to radio altimeter interference, for the fundamental emissions (3.7–3.98 GHz), at or above the power spectral density (PSD) curve threshold specified in Figure 1 of this AD. 2. Tolerance to radio altimeter interference, for the spurious emissions (4.2–4.4 GHz), at or above the PSD curve threshold specified in Figure 2 of this AD. B. A non-radio altimeter tolerant aeroplane is one for which the radio altimeter, as installed, does not Currently, all Bombardier aircraft are identified as “non-radio altimeter tolerant airplane”. All aircraft delivered after the applicable production Modsum (Ref. Table 1) or which incorporate the SBs (Ref. Table 3) mentioned within this AW meet the 5G interference “radio altimeter tolerant airplane” definition specified in FAA AD 2023-10-02 (Ref. 1.1) and TCCA AD CF- 2023-46 (Ref. 1.2). See FAA letter No. 720-23-00155 (Ref. 1.7) and No. 732-23-00175 (Ref. 1.8). Aircraft Type Production Modsum for RAD ALT filter incorporation Production Modsum Aircraft Effectivity Global 5/6 700T901700 9313 & 60110 - 61999 Global 7500 700T7095127 70192 - 79999 Challenger 350/3500 100T011140 20993 - 22999 Challenger 650 600-6703 6209 - 6999 Table 1 AW000-34-0010  Basic issue: Dec 15, 2021  Revision 08: September 29, 2023 Page 5 of 12 FAA AD 2023-10-02 (Ref. 1.1) TCCA AD CF-2023-46 (Ref. 1.2) Bombardier Guidance Regarding Compliance (ii) Tolerance to radio altimeter interference, for the spurious emissions (4.2–4.4 GHz), at or above the PSD curve threshold specified in figure 2 to paragraph (g)(1)(ii) of this AD. Figure 2 to paragraph (g)(1)(ii)— Spurious Effective Isotropic PSD at Outside Interface of Airplane Antenna demonstrate the tolerances specified in Part I paragraphs A.1. and A.2. of this AD. Figure 1 - Fundamental Effective Isotropic PSD at Outside Interface of Aircraft Antenna Figure 2 - Spurious Effective Isotropic PSD at Outside Interface of Airplane Antenna ” AW000-34-0010  Basic issue: Dec 15, 2021  Revision 08: September 29, 2023 Page 6 of 12 FAA AD 2023-10-02 (Ref. 1.1) TCCA AD CF-2023-46 (Ref. 1.2) Bombardier Guidance Regarding Compliance (2) For purposes of this AD, a “non- radio altimeter tolerant airplane” is one for which the radio altimeter, as installed, does not demonstrate the tolerances specified in paragraphs (g)(1)(i) and (ii) of this AD.” “(i) Airplane Flight Manual (AFM) Revision After June 30, 2023 For non-radio altimeter tolerant airplanes, do the actions specified in paragraphs (i)(1) and (2) of this AD (Ref. 1.1). (1) On or before June 30, 2023, revise the Limitations Section of the existing AFM to include the information specified in figure 4 to paragraph (i) of this AD This may be done by inserting a copy of figure 4 to paragraph (i) of this AD into the existing AFM. Incorporating the AFM revision required by this paragraph terminates the AFM revision required by paragraph (h) of this AD. (2) Before further flight after incorporating the limitations specified in figure 4 to paragraph (i) of this AD, remove the AFM Part III – AFM Revision After 30 June 2023 For non-radio altimeter tolerant aeroplanes, do the actions specified in Part III of this AD. A. On or before June 30, 2023, revise the Limitations Section of the existing AFM to include the information specified in Figure 4 of this AD. This may be done by inserting a copy of Figure 4 of this AD, or the AD itself, into the existing AFM. Incorporating the AFM revision required by this paragraph terminates the AFM revision required by Part II of this AD. B. Before further flight after incorporating the limitations specified in Figure 4 of this AD, remove the AFM revision required by Part II of this AD. C. Inform all flight crews of these new limitations and thereafter operate the For radio altimeter tolerant airplanes: No further action required for this portion of the AD. For non-radio altimeter tolerant airplanes: To comply with paragraph (i) of the FAA AD 2023-10-02 (Ref. 1.1) or the requirements of TCCA AD CF-2023-46 (Ref. 1.2), all the aircraft owner/operators flying in U.S airspace are required to carry the AFM/ TR revision (or later) listed in Table 2 below, as applicable to their aircraft. Note: FAA confirmed (Ref. 1.10) that the additional comma in the first bulleted item of Figure 4 of the AD 2023-10-02 (Ref. 1.1) is a clerical error. Therefore, only SA CAT I, SA CAT II, CAT II and CAT III procedures are prohibited. AW000-34-0010  Basic issue: Dec 15, 2021  Revision 08: September 29, 2023 Page 7 of 12 FAA AD 2023-10-02 (Ref. 1.1) TCCA AD CF-2023-46 (Ref. 1.2) Bombardier Guidance Regarding Compliance revision required by paragraph (h) of this AD. Figure 4 to paragraph (i)— AFM Revision for Non-Radio Altimeter Tolerant Airplanes ” aeroplane according to the limitations outlined in Figure 4 of this AD. Figure 4 – AFM Revision for Non-Radio Altimeter Tolerant Aeroplanes, After 30 June 2023 “ Aircraft Type AFM publication Applicable AFM/ TR revision (or later) AFM/TR release date (or later) Global Express CSP 700-1 AFM Rev. 117 July 25, 2023 Global Express XRS CSP 700-1A AFM Rev. 117 July 25, 2023 Global 5000 CSP 700-5000-1 AFM Rev. 78 July 25, 2023 Global 5000 ft. GVFD CSP 700-5000-1V AFM Rev. 47 July 25, 2023 Global 5500 CSP 700-5500-1 AFM Rev. 19 July 25, 2023 Global 6000 CSP 700-1V AFM Rev. 47 July 25, 2023 Global 6500 CSP 700-6500-1 AFM Rev. 19 July 25, 2023 Global 7500 CSP 700-7000-1 AFM Rev. 22 September 11, 2023 Challenger 300 CSP 100-1 TR Rev. 95-2 July 27, 2023 Challenger 350/3500 CH 350 AFM TR Rev. 26-2 July 27, 2023 Challenger 600 PSP 600 (DOT) PSP 600 (US) PSP 600-1 (DOT) TR Rev. 34-1 TR Rev. 33-1 TR Rev. 30-1 July 28, 2023 July 28, 2023 July 28, 2023 AW000-34-0010  Basic issue: Dec 15, 2021  Revision 08: September 29, 2023 Page 8 of 12 FAA AD 2023-10-02 (Ref. 1.1) TCCA AD CF-2023-46 (Ref. 1.2) Bombardier Guidance Regarding Compliance PSP 600-1 (US) TR Rev. 28-1 July 28, 2023 Challenger 601 PSP 601-1A (DOT) PSP 601-1A (US) PSP 601-1A-1 (DOT) PSP 601-1A-1 (US) PSP 601A-1 PSP 601A-1-1 PSP 601-1B (DOT) PSP 601-1B (US) PSP 601-1B-1 (DOT) PSP 601-1B-1 (US) TR Rev. 41-1 TR Rev. 39-1 TR Rev. 27-1 TR Rev. 27-1 TR Rev. 38-1 TR Rev. 40-1 TR Rev. 33-1 TR Rev. 31-1 TR Rev. 26-1 TR Rev. 26-1 July 28, 2023 July 28, 2023 July 28, 2023 July 28, 2023 July 28, 2023 July 28, 2023 July 28, 2023 July 28, 2023 July 28, 2023 July 28, 2023 Challenger 604 PSP 604-1 TR Rev. 46-1 July 27, 2023 Challenger 605 PSP 605-1 TR Rev. 30-1 July 27, 2023 Challenger 650 PSP 650-1 TR Rev. 15-1 July 27, 2023 Challenger 850 Note * Note * Note * Table 2 Note * For any information regarding Challenger 850 please refer to MHI RJ Flight Operation Note (FON) (Ref. 1.6) AW000-34-0010  Basic issue: Dec 15, 2021  Revision 08: September 29, 2023 Page 9 of 12 FAA AD 2023-10-02 (Ref. 1.1) TCCA AD CF-2023-46 (Ref. 1.2) Bombardier Guidance Regarding Compliance Owner/operators are required to inform their flight crews where the copy is located and operate the airplanes according to the limitations specified after June 30th, 2023. Flight crews may also consult the FONs (Ref. 1.3) for more details about the potential adverse effects of radio altimeter interference. “(j) Terminating Action for AFM Limitations (1) Modifying the airplane from a non- radio altimeter tolerant airplane to a radio altimeter tolerant airplane terminates the limitations in paragraph (i) of this AD for that airplane. (2) After modifying the airplane to a radio altimeter tolerant airplane, the limitations specified by paragraph (i) of this AD may be removed from the AFM.” “Part IV – Terminating Action for AFM Limitations A. Modifying the aeroplane from a non- radio altimeter tolerant airplane to a radio altimeter tolerant airplane terminates the limitations in Part III of this AD for that aeroplane. B. After modifying the aeroplane to a radio altimeter tolerant airplane, the limitations specified by Part III of this AD may be removed from the AFM.” All US and non-US registered aircraft can install radio altimeter tolerant equipment to remove the operating limitations and mitigate the safety risk from 5G C-Band Radio Altimeter interference. Please note that US registered aircraft operating under 14 CFR Part 121 are required to install radio altimeter tolerant equipment before February 1st, 2024, to continue operating under 14 CFR Part 121. For Challenger CL-600-1A11/ -2A12/ -2B16 (CH6XX Series) and BD-100-1A10 (CH3XX Series) and for Global BD-700-1A10 and BD-700-1A11 (Global Express, XRS, G5000, G6000, G5000 Vision, G6500, G5500), the Bombardier proposed solution is introducing an external bandpass filter between the receiver antenna and the Radio Altimeter unit via Bombardier Recommended Service Bulletin (SB) (Ref. Table 3). AW000-34-0010  Basic issue: Dec 15, 2021  Revision 08: September 29, 2023 Page 10 of 12 FAA AD 2023-10-02 (Ref. 1.1) TCCA AD CF-2023-46 (Ref. 1.2) Bombardier Guidance Regarding Compliance For Global BD-700-2A12 (G7500), the proposed solution is an upgraded Radio Altimeter (ALT-4000) unit with internal bandpass filter, also offered via recommended SB (Ref. Table 3). The bandpass filter will provide the additional signal rejection required to ensure that radio signals, such as those emitted by 5G mobile technology base stations and repeaters in US airspace, will not affect the performance of the Radio Altimeter Receiver. Aircraft Type Service Bulletin Global Express/ XRS 700-34-067 Global 5000 700-1A11-34-041 Global 5000 ft. GVFD 700-34-5037 Global 5500 700-34-5519 Global 6000 700-34-6037 Global 6500 700-34-6518 Global 7500 700-34-7526 Challenger 300 100-34-50 Challenger 350/3500 350-34-029 AW000-34-0010  Basic issue: Dec 15, 2021  Revision 08: September 29, 2023 Page 11 of 12 FAA AD 2023-10-02 (Ref. 1.1) TCCA AD CF-2023-46 (Ref. 1.2) Bombardier Guidance Regarding Compliance Challenger 604 604-34-071* Challenger 605 605-34-039 Challenger 650 650-34-024 Table 3 Note * SB expected in Q2 2024 Airplanes incorporating this SB (Ref. Table 3) meet the 5G interference “radio altimeter tolerant airplane” definition specified in FAA AD 2023-10-02 (Ref. 1.1) and therefore the operational limitations introduced by this AD (Ref. 1.1) will no longer apply. Furthermore, the AFM Limitations introduced for Autopilot and Autothrottle operation in the presence of 5G C-Band interference will be lifted for radio altimeter tolerant airplanes. AW000-34-0010  Basic issue: Dec 15, 2021  Revision 08: September 29, 2023 Page 12 of 12 Separate Advisory Wires (Ref. 1.4 and 1.5) have been published to cover the product specific 5G C-Band interference ADs. Operators are reminded to comply with all AFM limitations applicable to 5G C-Band Radio altimeter interference, including the one related to Autopilot and Autothrottle limitations. Operators experiencing RA anomalies in US airspace should notify air traffic control, as soon as practical. Post flight, pilots are encouraged to submit detailed reports of RA disruptions or interference events, as soon as practical, using the Radio Altimeter Anomaly Reporting Form available on the FAA website and Bombardier Field Service Representative (FSR) or the Customer Response Center (CRC). FAA website: https://www.faa.gov/air_traffic/nas/RADALT_reports/ Should you have any query pertaining to this AW, please contact your FSR or the CRC.

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