SPECIAL AIRWORTHINESS INFORMATION BULLETIN SAIB: CE-10-38R1
Cessna Citation XLS+ · Airworthiness Directives
Overview
This Special Airworthiness Information Bulletin (SAIB) addresses an airworthiness concern related to the Honeywell GPS sensor used in various navigation systems. It highlights a potential issue where a missed Global Positioning System (GPS) Non-Precision Approach (NPA) may occur during flights exceeding five hours if no backup navigation system is available. The bulletin is not a mandatory directive but provides recommendations for pilots to ensure they are prepared for alternative navigation methods should the situation arise. The document revises a previous SAIB by updating the models and part numbers affected by this issue, primarily focusing on the Honeywell GPS sensors used in the Cessna Citation XLS and other aircraft.
- Pilots should be aware of the potential for GPS navigation loss during flights over five hours without backup systems.
- The issue is linked to Honeywell GPS sensors, specifically the VIDL-G Navigation Receiver.
- The FAA does not consider this issue an unsafe condition warranting mandatory action.
- Pilots are advised to prepare for alternative navigation methods if GPS issues occur.
- Affected Honeywell models include GNS-XES, GNS-XLS, KLN-900, and others.
Document
Source
Originally published by www.cessnaflyer.org. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Airworthiness Directives
- Year
- 2010
- Pages
- 3
- File size
- 52 KB
- Publisher
- www.cessnaflyer.org
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In this document
Introduction
The SAIB informs pilots about a potential airworthiness concern regarding the Honeywell GPS sensor, particularly during long flights without backup navigation systems. It emphasizes the importance of being prepared for alternative navigation methods.
Background
The bulletin discusses a reported issue involving the Honeywell VIDL-G Navigation Receiver, which experienced a temporary loss of GPS navigation during a flight on a Dassault F7X airplane. This issue was linked to a latent software defect affecting multiple Honeywell GPS receivers.
Recommendations
The FAA recommends that pilots ensure they are ready to switch to alternative navigation methods if they encounter a loss of GPS navigation. This preparation is crucial for maintaining safety during flights.
Affected Models and Part Numbers
The document lists specific Honeywell GPS models and their part numbers that may be affected by the identified issue. This includes various GNS and KLN models, which are integral to the navigation systems in the Cessna Citation XLS.
Safety notes
- Ensure readiness to revert to alternative navigation methods if GPS navigation is lost.
Full document text
FAA Aviation Safety SPECIAL AIRWORTHINESS INFORMATION BULLETIN SAIB: CE-10-38R1 SUBJ: Navigation Date: August 18, 2010 This is information only. Recommendations aren’t mandatory. Introduction This Special Airworthiness Information Bulletin advises you of an airworthiness concern regarding a missed Global Positioning System (GPS) Non-Precision Approach (NPA), which may be caused by the Honeywell GPS sensor when no backup navigation system is available on flights greater than 5 hours. The sensors are used in the following products: • Flight Management System: GNS-XES, GNS-XLS, GNS-XLS Enhanced, GNS-XLS PRNAV, GNS-XLS Enhanced PRNAV, GNS-XL, GNS-XL PRNAV, GS-2100, CDU-XLS • GPS Navigator: KLN-35A, KLN-89B, KLN-90B, KLN-94, KLN-900, KLX-135, KLX- 135A, KLX-189B • TAWS: KMH-820, KMH-920, KGP-560, KGP-860, MK-XXI, MK V, MK VII, MK VI, MK VIII, MK XXII • GNSS: KGS-200 • IC-615: IC-615 • EPIC Radio: VIDL-G At this time, the FAA has determined that this airworthiness concern is not an unsafe condition that would warrant airworthiness directive (AD) action under Title 14 of the Code of Federal Regulations (14 CFR) part 39. This SAIB revises SAIB CE-10-38, dated July 15, 2010, by updating the models and part numbers. Background On March 30, 2010, Honeywell International, Inc. (Olathe, KS) provided the Wichita Aircraft Certification Office (ACO) written notification of a possible safety issue (i.e., annunciated temporary loss of GPS navigation) against the Mercury PX Global Navigation System Sensor (GNSS) within its host VOR/ILS Data Link with GPS (VIDL-G) Receiver (Honeywell P/N: 7026207-802), which was initially discovered during an extended flight on a Dassault F7X airplane. An end customer flying a Dassault F7X airplane with a Honeywell VIDL-G Navigation Receiver experienced an annunciated temporary loss of GPS navigation during an extended flight between ESGG (Gothenburg-Landvetter Airport, Sweden) and KBFI (Boeing Field, Seattle WA). Flight deck effects included steady reduction in the number of tracked GPS satellites resulting in related CAS messages (NAV: FMS/GPS 1+2 MONITOR), degradation of the GPS operating mode to altitude aiding, and ultimately temporary loss of navigation from the GPS. The end customer reported this issue to the airframe manufacturer who, in turn, notified Honeywell. The VIDL-G navigation receiver incorporates a Mercury PX GNSS and is certified to TSO-C129a (Class B1/C1) Airborne Supplemental Navigation Equipment using the GPS. This annunciated 1 temporary loss of GPS navigation function had not been previously observed by Honeywell and was not revealed by TSO-C129a testing. Honeywell has isolated the issue to a latent defect in the software that is common to all of Honeywell’s 8-channel GPS receivers. The affected models and their part numbers are listed below. Model Part Number(s) CDU-XLS 18420-0101-0xxx GNS-XES 17450-0305-xxxx, 17450-0307-xxxx, 17450-0406-xxxx GNS-XL 18355-0101-00xx, 18355-0101-01xx GNS-XL PRNAV 18355-0102-xxxx GNS-XLS 17960-0101-0xxx, 17960-0102-0xxx GNS-XLS Enhanced 17960-0203-0xxx GNS-XLS Enhanced PRNAV 17960-0204-0xxx GNS-XLS PRNAV 17960-0103-0xxx GS-2100 066-01160-2502 IC 615 7017000-21xxx,-25xxx,-94xxx, -95xxx, -98xxx, -99xxx KGP 560 066-01196-0x0x (RMD PN 965-1196-0xx, 965-1198-0xx) KGP 860 066-01197-0205 (RMD PN 965-1199-00x) KGS 200 066-01201-0101 KLN 35A 066-01151-0101 KLN 89B 066-01148-x1x1, 066-01148-x1x2 KLN 900 066-04034-0101,-0201, -0102, -0104, -0202, and -0204 KLN 90B 066-04031-xxx1, 066-04031-xxx2, 066-04031-xxx4 KLN 94 069-01034-01xx KLX 135 070-01029-0000, 070-01029-0001 KLX 135A 069-01029-0703 KLX 189B 066-01161-7000 KMH 820 066-01175-210x, 066-01175-220x KMH 920 066-01178-210x, 066-01178-220x MK V 965-0976-020-XXX-XXX, 965-0976-060-XXX-XXX, 965-1681-002 MK VI 965-1186-XXX, 965-1190-XXX MK VII 965-1076-020-XXX-XXX, 965-1076-030-XXX-XXX, 965-1076-060-XXX-XXX MK VIII 965-1216-XXX, 965-1220-XXX MK XXI 066-01227-0x01x (RMD PN 965-1227-00x) MK XXII 965-1590-XXX, 965-1595-XXX VIDL-G 7026207-XXX 2 Recommendations The FAA recommends that the pilot assure that he/she is prepared to revert to an alternative means of navigation appropriate to the flight if the above situation occurs. For Further Information Contact Albert Ma, Aerospace Engineer, FAA Wichita Aircraft Certification Office, Mid-Continent Airport 1801 Airport Rd., Wichita, KS 67209; phone: (316) 946-4151; fax: (316) 946-4107; e-mail: albert.ma@faa.gov. 3