Cessna 177 Stabilator Balance Weight Arm - Bracket
CESSNA 177 · Service Bulletins
Overview
This Airworthiness Bulletin addresses the stabilator balance weight arm brackets installed on all Cessna 177 Series aircraft. It highlights the potential issue of cracking in the aluminium brackets, which could lead to loss of control if not addressed. The bulletin is intended for operators and maintainers of the Cessna 177, providing guidance on inspection and replacement of the brackets. It references a previous service bulletin (SEB 89-1) that outlines inspection protocols and the recommendation to replace aluminium brackets with stronger steel alternatives.
- All Cessna 177 Series aircraft with aluminium stabilator balance weight arm brackets are affected.
- Cracking in the brackets can lead to loss of control of the aircraft.
- Inspect aluminium brackets in accordance with SEB 89-1 Rev. 3 or later.
- Consider replacing aluminium brackets with stronger steel brackets.
- Initial crack inspection threshold is set at 2000 hours of flight time.
Document
Source
Originally published by www.casa.gov.au. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Bulletins
- Year ·
- 2012
- Pages ·
- 12
- File size ·
- 1.3 MB
- Publisher ·
- www.casa.gov.au
What is the Cessna 177 Stabilator Balance Weight Arm - Bracket?
The Cessna 177 Stabilator Balance Weight Arm - Bracket is a service bulletins for the CESSNA 177, dated 2012.
How many pages is the Cessna 177 Stabilator Balance Weight Arm - Bracket?
The copy of the Cessna 177 Stabilator Balance Weight Arm - Bracket on file runs 12 pages.
Where does the Cessna 177 Stabilator Balance Weight Arm - Bracket come from?
This copy of the Cessna 177 Stabilator Balance Weight Arm - Bracket was originally published by www.casa.gov.au and is hosted on Sprinkle as a free, searchable reference copy.
What year was the Cessna 177 Stabilator Balance Weight Arm - Bracket published?
The Cessna 177 Stabilator Balance Weight Arm - Bracket — the CESSNA 177 service bulletins on file — is dated 2012.
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In this document
Applicability
This bulletin applies to all Cessna 177 Series aeroplanes equipped with aluminium stabilator balance weight arm brackets.
Purpose
The purpose of this bulletin is to alert operators and maintainers about the risk of cracking in the aluminium balance weight arm attachment brackets, which could lead to a loss of control of the aircraft.
Background
The Civil Aviation Safety Authority (CASA) received reports of cracking in the aluminium stabilator balance weight brackets. Cessna previously issued Service Bulletin SEB 89-1 in 1989, which identified the possibility of cracking after 2000 hours of flight time. The inspection threshold was later reduced to 2000 hours, with regular inspections required until the brackets are replaced.
Recommendations
CASA recommends that operators inspect the aluminium brackets according to the requirements of SEB 89-1 Rev. 3 and consider replacing them with steel brackets to enhance safety.
Enquiries
For further inquiries regarding this bulletin, operators can contact the Airworthiness & Engineering Branch of CASA via email or postal address provided in the document.
Safety notes
- Failure of the stabilator balance weight brackets could lead to loss of control.
Full document text
AIRWORTHINESS BULLETIN Cessna 177 Stabilator Balance Weight Arm - Bracket AWB 27-014 Issue : 1 Date : 17 August 2012 Page 1 of 1 1. Applicability All Cessna 177 Series aeroplanes with aluminium stabilator balance weight arm brackets installed. 2. Purpose Alert operators and maintainers regarding cracking in the aluminium balance weight arm attachment brackets. Failure of the stabilator balance weight brackets could lead to loss of control. 3. Background CASA has received a defect report of cracking in all four of the aluminium stabilator balance weight attachment brackets. Cessna issued Single Engine Service Bulletin SEB 89-1 following reports of small cracks in the aluminium brackets in a limited number of aircraft owned by one operator in 1989. Apparently, reports of cracking increased following the issue of SEB 89-1, which identified the possibility of cracking at 2000 hours flight time since new. Cessna advanced SEB 89-1 to Revision 3, reducing the initial crack inspection threshold from 5000 hours to 2000 hours and maintaining the 200 hour/12 month inspection until replaced with stronger steel brackets which are listed in the SEB. 4. References Cessna Single Engine Service Bulletin SEB 89-1 Rev. 3 (Attached) 5. Recommendations CASA strongly recommends that Operators: 1. Determine if, where aluminium brackets are installed, that they are inspected in accordance with the requirements of SEB 89-1 Rev.3 (or later revision). 2. Consider replacing the aluminium stabilator balance weight brackets with steel brackets. 6. Enquiries Enquiries with regard to the content of this Airworthiness Bulletin should be made via the direct link e-mail address: AirworthinessBulletin@casa.gov.au or in writing, to: Airworthiness & Engineering Branch Civil Aviation Safety Authority GPO Box 2005, Canberra, ACT, 2601