Feedback - Canadian Aviation Service Difficulty Reports
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- Fixed Wing
- Suspected Unapproved Parts (SUP)
- FAA Unapproved Parts Notifications (UPN)
- FAA Special Airworthiness Information Bulletins (SAIB)
- EASA Safety Information Bulletin (SIB)
- Equipment Airworthiness Directives
- Service Difficulty Reports
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Elevator Bolt Failure
A Canadian operator experienced a complete loss of elevator control because of a failure of the bolt attaching the elevator control rod to the elevator walking beam under the cockpit floor. Due to this event, the FAA issued Airworthiness Directive AD 2015-19-10, which supersedes AD 97-02-02 and applies to models SA26-AT, SA26-T, SA226-AT, SA226-T, SA226-T(B), SA226-TC, SA227-AC (C-26A), SA227-AT, SA227-BC (C-26A), SA227-CC, SA227-DC (C-26B), and SA227-TT aeroplanes. AD 97-02-02 required applying torque to the control column pitch bearing attaching nuts, inspecting the bearing assembly, inspecting the elevator control rod end bearing retainer/dust seals, and replacing or installing new parts as necessary. This new AD requires inspecting for movement and correct torque of the elevator the elevator control pivot bearing, inspecting the elevator rod bolt and requires replacement of the control column pivot bearing with improved design by 35 000 hours time in service.
A follow-up inspection of the operator's fleet revealed a variety of hardware installed. Some hardware matched the illustrated parts catalog (IPC), some matched the AD 97-02-02 configuration, and some matched neither of those configurations.
When AD 97-02-02 was issued, the IPC was never revised to match the hardware configuration called out in AD 97-02-02 or in the service information associated with that AD. Because of the conflict between the AD and the IPC configurations, an aeroplane that was in compliance with the requirements of AD 97-02-02 could have had an incorrect hardware configuration installed during routine maintenance after complying with the AD. The IPC has been subsequently updated and corrected by M7 Aerospace, LLC.
Additionally, since the issue of AD 97-02-02, the manufacturer developed an improved design for the control column pivot bearing and support structure that terminates the repetitive torque check and replacement of control column pivot bearings.
The manufacturer also issued new service information that adds the 10 000-hour time in service (TIS) repetitive replacement of the control column pivot bearing to the airworthiness limitations section (ALS) of the aircraft maintenance manual (AMM) and requires the replacement of the pivot bearing with the improved design within 35 000 hours TIS as part of the supplemental inspections document (SID). Issue of the new service information, the revised IPC, and AD 2015-02-02 will eliminate the conflicts between AD 97-02-02, the service information, the IPC, the ALS, and the SID.
AD 2015-19-10 does not retain any of the requirements of AD 97-02-02. It requires inspecting for movement and correct torque of the elevator control pivot bearing, inspecting the elevator control rod for damage, and replacing parts as necessary. This AD also requires a 10 000-hour time in service repetitive replacement of the control column pivot bearing and require replacement of the control column pivot bearing with the improved design within 35 000 hours time in service.
Service Difficulty Reports about fixed wing that either show a trend or should be known by the airworthiness community.
These are the most recent articles. The full list of articles can be found on the Fixed Wing page.
Service Difficulty Reports about engines that either show a trend or should be known by the airworthiness community.
These are the most recent articles. The full list of articles can be found on the Engines page.
Service Difficulty Reports about rotorcraft that either show a trend or should be known by the airworthiness community.
These are the most recent articles. The full list of articles can be found on the Rotorcraft page.
Suspected Unapproved Parts (SUP)
In Canada, SUPs are reported in accordance with section 571.13 of the standard of the Canadian Aviation Regulation (CAR).
When you suspect an unapproved part, the SUP report can be submitted on the SDR form or through the Web Service Difficulty Reporting System.
FAA Unapproved Parts Notifications (UPN)
Unapproved Parts Notifications are published by: FAA, AIR-140, P.O. Box 26460, Oklahoma City, OK 73125.
FAA Special Airworthiness Information Bulletins (SAIB)
A Federal Aviation Administration (FAA) SAIB is an information tool that alerts, educates, and makes recommendations to the general aviation community. It is non-regulatory information and guidance that does not meet the criteria for an Airworthiness Directive (AD).
EASA Safety Information Bulletin (SIB)
European Aviation Safety Agency (EASA) SIB is an information tool that alerts, educates, and makes recommendations to the general aviation community. It is non-regulatory information and guidance that does not meet the criteria for an Airworthiness Directive (AD).
Equipment Airworthiness Directives (AD)
Transport Canada (TC) endeavours to send copies of new Airworthiness Directives (ADs), which are applicable in Canada to the registered owners of the affected products. Equipment/appliance ADs are often only distributed to our regional offices because the owners of aircraft affected by this type of AD are not generally known.
Aircraft Maintenance Engineers (AMEs) and operators of the affected products are encouraged to obtain further information or a copy of the ADs from their regional TC office, their local Transport Canada Centre (TCC), their Principal Maintenance Inspector (PMI), or from the Civil Aviation AD website
Service Difficulty Reports (SDR)
Service Difficulty Reports are submitted by Aircraft Maintenance Engineers (AMEs), owners, operators and other sources to report problems, defects or occurrences that affect aircraft airworthiness in Canada.
Civil Aviation Internet Sites
Transport Canada Civil Aviation
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- Issue 4/2015 (Accessible PDF)
- Issue 3/2015 (Accessible PDF)
- Issue 2/2015 (Accessible PDF)
- Issue 1/2015 (Accessible PDF)
Reprints of original Feedback material are encouraged, but credit must be given to Transport Canada's Feedback. Please forward one copy of the reprinted article to the Editor.
To obtain information concerning copyright ownership and restrictions on reproduction of the material, please address your correspondence to:
Jérémie Laviolette, Editor
Transport Canada (AARDG)
Place de Ville, Tower C
Ottawa ON K1A 0N5
Tel.: 888-663-3639 Fax: 613-996-9178
The articles contained in Feedback are derived from Service Difficulty Reports (SDRs) submitted by Aircraft Maintenance Engineers (AMEs), owners, operators and other sources in accordance with Canadian Aviation Regulation (CAR) 521.
SDRs are normally published verbatim. Transport Canada assumes no responsibility for the accuracy or content of any of these reports. Only spelling errors are corrected and content may be reduced as well as personal references deleted.
All defects or occurrences should be reported to Transport Canada through the Service Difficulty Reporting Program. For additional information about this program or concerning an article in Feedback, contact your nearest Transport Canada Centre.
For all technical inquires related to articles of this magazine, please address your correspondence to CAWWebFeedback@tc.gc.ca
© Her Majesty the Queen in Right of Canada, as represented by the Minister of Transport (2016).
ISSN 1925-8429 (Online)
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