MANDATORY SERVICE BULLETIN Z142/54a
Moravan Z-142 · Service Bulletins
Overview
This document is a mandatory service bulletin for the Moravan Z-142 aircraft, specifically addressing safety concerns related to unstrengthened wings. It outlines required actions to ensure the aircraft's safe operation and extends the aircraft's safe life from 3600 to 4800 hours TIS under certain conditions.
- Applicable to all Z142 aircraft with unstrengthened wings.
- Acrobatic operations are prohibited for aircraft with unstrengthened wings.
- Aircraft safe life can be extended from 3600 to 4800 hours TIS.
- Mandatory inspections and replacements are required for certain components.
- Operators must record flight times in the Aircraft Log Book.
- Reconstruction of the root wing part is necessary for safe life extension.
- Technical Commission must inspect aircraft for condition assessment.
- Immediate compliance with the bulletin is required.
Document
Source
Originally published by zlinaircraft.eu. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Bulletins
- Year ·
- 2007
- File size ·
- 649 KB
- Publisher ·
- zlinaircraft.eu
- Language ·
- en
Specifications & performance
Extracted from this document.
Specifications
- Total safe life hours ·
- 4800
- Original safe life hours ·
- 3600
Performance
- Max acrobatic hours ·
- 190
What is the MANDATORY SERVICE BULLETIN Z142/54a?
The MANDATORY SERVICE BULLETIN Z142/54a is a service bulletins for the Moravan Z-142, dated 2007.
Where does the MANDATORY SERVICE BULLETIN Z142/54a come from?
This copy of the MANDATORY SERVICE BULLETIN Z142/54a was originally published by zlinaircraft.eu and is hosted on Sprinkle as a free, searchable reference copy.
What year was the MANDATORY SERVICE BULLETIN Z142/54a published?
The MANDATORY SERVICE BULLETIN Z142/54a — the Moravan Z-142 service bulletins on file — is dated 2007.
Most owners only have the POH. Here's the essential set for the Moravan Z-142.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
More Moravan Z-142manuals & documents
- Technical Manual Z 43Maintenance Manual
- MANDATORY SERVICE BULLETIN Z 142/52aService Bulletins
- MANDATORY SERVICE BULLETIN Z 142C/28a – Rev. 1Service Bulletins
- MANDATORY SERVICE BULLETIN Z 142C/17aService Bulletins
- MANDATORY SERVICE BULLETIN Z 142/40a, Z 43/39aService Bulletins
- MANDATORY SERVICE BULLETIN Z 42/43a Z 142/39a Z 43/38aService Bulletins
Related documents
- MANDATORY SERVICE BULLETIN Z 142C/17aMoravan Z-142 · Service Bulletins
- MANDATORY SERVICE BULLETIN Z 126, Z 226/38aZLIN Z-126 · Service Bulletins
- MANDATORY SERVICE BULLETIN Z 142C/28a – Rev. 1Moravan Z-142 · Service Bulletins
- MANDATORY SERVICE BULLETIN Z 142/52aMoravan Z-142 · Service Bulletins
- MANDATORY SERVICE BULLETIN Z 42/43a Z 142/39a Z 43/38aMoravan Z-142 · Service Bulletins
In this document
Reason for Bulletin
The bulletin addresses the need to change acrobatic operation limits due to findings from the AMU1 Acceleration Monitoring Unit, which indicated that some aircraft exceed original load expectations.
Actions Required
Aircraft with unstrengthened wings must not operate in the acrobatic category and must undergo specific inspections and replacements based on their flight hours.
Safe Life Prolongation
The safe life of the aircraft can be extended to 4800 hours TIS if certain conditions are met, including the performance of required inspections and modifications.
Mandatory Replacements
Specific airframe parts must be replaced based on flight hours and operational category, including conic pins and bushings of main wing hinges.
Inspection Requirements
Visual checks and mandatory inspections of airframe parts are required at specified intervals to ensure safety.
Compliance and Documentation
Operators must replace original documentation pages and record compliance in the Aircraft Log Book.
Safety notes
- Aircraft with unstrengthened wings cannot operate in the acrobatic category.
- Mandatory replacements must be performed at specified inspections.
- Failure to comply with the bulletin may compromise safety.
- Aircraft exceeding 190 hours TIS in acrobatic/utility category must be transferred to normal category.
- All fitted bolts must be replaced if any single bolt is found loose or failed.
Full document text
MANDATORY SERVICE BULLETIN Z142/54a Technical content of the document approved on the basis of DOA Approval No. EASA.21J.110 „SAFETY RELATED“ 1. DATE: March 8, 2007 2. APPLICABLE TO: All Z142 aircraft with unstrengthened wings. 3. REASON: 3.1 After the AMU1 Acceleration Monitoring Unit has been entered into operation on ZLIN aircraft of Z42 series, it has been found out that real intensity of acrobatic operation of some aircraft considerably exceeds original expectations that have been used for determination of operation limits. These aircraft exceed determined total limit load spectra and limit design acrobatic load spectrum. To ensure a safety, it is necessary from these reasons to change the limits for acrobatic safe life. 3.2 Aircraft safe life time prolongation from 3600 to 4800 hours TIS. 4. ACTIONS REQUIRED: 4.1 Limits for the aircraft with unstrengthened wings. The aircraft with unstrengthened wings cannot be further operated in ACROBATIC category. 4.1.1 The aircraft with unstrengthened wings, which have not reached the limit of 190 hours TIS in ACROBATIC and/or UTILITY category, can reach this limit in UTILITY category only, at keeping the total safe life time limit of 3600 hours TIS. A flight in ACROBATIC category is a flight during which acrobatic maneuvres permitted in the Aircraft Log Book for ACROBATIC category are performed. A flight in UTILITY category is a flight during which acrobatic maneuvres permitted in the Aircraft Log Book for UTILITY category are performed. Page 1 of 6 MANDATORY SERVICE BULLETIN Z142/54a Flight time is total time from the instant of aircraft first movement for the purpose of take-off to the instant when the aircraft finally stops in the end of that flight. Aircraft operator is obliged to record flights performed in UTILITY category including pertinent flight time into the Aircraft Log Book. Flights in UTILITY category are marked with U letter in the Aircraft Log Book. Note: Till this bulletin has been issued, it was prescribed to record flights performed in ACROBATIC and UTILITY category into Aircraft Log Book with symbol A. 4.1.2 Perform following works on the aircraft which have exceeded the limit of 190 hours TIS in ACROBATIC and/or UTILITY category: - reconstruction of root wing part - replacement of conic pins and bushings of main wing hinges - replacement of pins of rear wing hinges Further operation is possible in NORMAL category only up to the total safe life limit of 3600 hours TIS. 4.1.3 Mandatory replacements of airframe parts with limited safe life time: Conic pins and bushings of main wing hinges Pin of rear wing hinge - on the aircraft which have reached less than 190 hours TIS in ACROBATIC and UTILITY category – replace at nearest “C” inspection or overhaul. - on the aircraft which have reached more than 190 hours TIS in ACROBATIC and UTILITY category and on which these parts have not been replaced during reconstruction of wing root part – replace at that „B“ or “C” inspection (or 600 hours inspection or overhaul) which comes first of all. Fitted bolts of upper outer and upper inner wing hinges In case of loosening or failure of even one single fitted bolt, replacement of all 20 bolts on both parts of upper hinge shall be performed Page 2 of 6 MANDATORY SERVICE BULLETIN Z142/54a 4.1.4 Mandatory inspections of airframe parts: Visual check of loosening or failure of fitted bolts of upper outer wing hinges (on upper side of the wing) - At pre-flight inspection - After 100 hours TIS or after 1 year, depending on what comes earlier 4.1.5 Cancel Mandatory Service Bulletin Z142/42a. 4.1.6 Pertinent changes of aircraft accompanying documentation. 4.2 Aircraft safe life time prolongation from 3600 to 4800 hours TIS. Based on accomplishment of actions stated below, total safe fatigue life time can be increased from 3600 to 4800 hours TIS if demonstrably not more than 190 hours TIS in Acrobatic and / or Utility Category has been reached and reconstruction of root wing part has been performed. 4.2.1 Not later than at reaching total time of 3600 hours TIS, the aircraft shall be transferred to Normal Category only, even in case that maximum permitted limit of 190 hours TIS for ACROBATIC and/or UTILITY category operation has not been reached. 4.2.2 Performance of inspection after 100 hours TIS of operation according to Technical Manual of the aircraft. Performance of “A” inspection according to aircraft manual for operation without overhaul if the aircraft is operated in the maintenance system without overhauls. 4.2.3 Technical Commission of Aircraft Manufacturer shall perform an inspection to consider technical condition of the aircraft and to decide what inspections and repairs up to the level of overhaul or “C” inspection shall be performed. 4.2.4 Reconstruction of root part of main wing spar shall be performed at the latest at total number of 3600 hours TIS on that aircraft on which this reconstruction has not been performed yet. Page 3 of 6 MANDATORY SERVICE BULLETIN Z142/54a The reconstruction consists in: • Replacement of original Z42.2111-00.12 and Z42.2211-00.12 lower hinges with strengthened L242.2111-00.12 and L242.2211-00.12 lower hinges. • Replacement of Z42.2111-00.32 and Z42.2211-00.32 reinforcements made of Z424253.61 aluminium alloy with new reinforcements made of L-CM3.7 steel. • Addition of L242.2111-00.45 reinforcement on the web of root part of main wing spar. • Replacement of all fitted bolts which fasten Z42.2100-00.26 upper outer hinges and Z42.2111-00.21 upper inner hinges (see picture in enclosure). 4.2.5 Replacement of the pressure gauge of lower flange of main fuselage spar with new gauge shall be performed. 4.2.6 Aircraft maintenance from time of 3600 hours TIS up to expiration of total safe life of 4800 hours TIS is based on performance of periodical inspections up to 100 hours TIS level (or “A” inspections), annual inspections inclusive.
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Performance of inspections after 600 hours TIS and overhauls (or “B” and “C” inspections) is superseded by performance of periodical inspections by Technical Commission of Aircraft Manufacturer after each 200 hours TIS. 4.2.7 Pertinent changes of aircraft accompanying documentation. 4.2.8 Cancel Mandatory Service Bulletin Z142/49a-Rev.1. Warning: The aircraft with unstrengthened wings on which the reconstruction of root wing part has been performed but at which the limit of 190 hours TIS in ACROBATIC and/or UTILITY category has been exceeded can be operated in NORMAL category only up to the total limit of 3600 hours TIS. 5. ACCOMPLISHMENT: Immediately after bulletin receipt. 6. PERFORMED BY: 6.1 Limits for the aircraft with unstrengthened wings, see paragraph 4.1: Operator (replacement of pages in accompanying documentation). Page 4 of 6 MANDATORY SERVICE BULLETIN Z142/54a 6.2 Aircraft safe life time prolongation from 3600 to 4800 hours TIS, see paragraph 4.2: 6.2.1 Inspection by Technical Commission of the Aircraft Manufacturer on operator´s order. 6.2.2 With regard to complexity of works and experiences from aircraft operation, reconstruction of root part of main wing spar shall be performed by the aircraft manufacturer on operator´s order. 6.2.3 Operator (replacement of pages in accompanying documentation). 7. COSTS COVERED BY: Operator 8. MATERIAL: 8.1 Limits for the aircraft with unstrengthened wings, see paragraph 4.1: 8.1.1 New pages of accompanying documentation – see Enclosures. 8.2 Aircraft safe life time prolongation from 3600 to 4800 hours TIS, see paragraph 4.2: 8.2.1 Material for reconstruction of root wing part (lower hinges including fasteners) will be supplied by aircraft manufacturer as a part of wing reconstruction order. 8.2.2 AP-6 pressure gauge (or new 308/III version) will be supplied by manufacturer on order. 8.2.3 New pages of accompanying documentation – see Enclosures. 9. PROCEDURES: 9.1 Limits for the aircraft with unstrengthened wings, see paragraph 4.1: Replace original pages of manuals by new pages. Record change accomplishment into List of Changes. 9.2 Aircraft safe life time prolongation from 3600 to 4800 hours TIS: 9.2.1 Technical Commission of the Aircraft Manufacturer will perform aircraft inspection at operator´s expenses. A range of necessary aircraft repairs will be determined on the basis of this inspection. Page 5 of 6 MANDATORY SERVICE BULLETIN Z142/54a 9.2.2 Transfer aircraft operation to “N” (NORMAL category). 9.2.3 Perform following works on each aircraft: a) Reconstruction of root part of main wing spar (according to para. 4 of this bulletin). b) Replacement of AP-6 pressure gauge of main fuselage spar by a new one. 9.2.4 Record works performance to Aircraft Log Book. 9.2.5 Replace original pages of manuals by new pages. Record change accomplishment into List of Changes. 10. ENCLOSURE: 10.1 Picture of modification of main wing spar. 10.2 New pages of accompanying documentation with date of issue 8.3.2007: - Technical Manual of the Z142 Aircraft, Czech version: 8; 78; 103A; 103B; 103C; 105; 106D; 106E - Technical Manual of the Z142 Aircraft, English version: 8; 78; 103A; 103B; 103C; 105; 107 ..................................... Dušan Totek Chief Designer Contact address: Moravan Aviation s.r.o. ZLIN Service 765 81 Otrokovice Czech Republic Page 6 of 6