- Effective
- December 13, 1980
- Models
- 737-100 Series, 737-200 Series, 737-200C Series, 737-300 Series, 737-400 Series, 737-500 Series and 3 more
- Data sheet
- TCDSA16WE
- Registered aircraft
- 823 matched by model
- Product
- Aircraft · Large airplane
- Amendment
- 39-4072
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 20 KB | 73d8ff29…52142fb | FAA DRS (API key needed) |
On this page
The airworthiness directive
80-26-51 BOEING: Amendment 39-4072. Applies to Boeing Model 737 series airplanes, certificated in all categories, prior to line number 726. To prevent control system jamming, accomplish the following within the next 150 hours time-in-service after the effective date unless already accomplished, or unless the affected bolt assemblies have been removed and reinstalled since manufacture.
1. Inspect the bolt assemblies installed at the upper and lower clevis of each elevator power control unit input rod assembly for proper installation in accordance with Boeing Alert Service Bulletin 27A1109, dated December 11, 1980, or later FAA-approved revisions. Bolt assemblies not properly installed must be reinstalled in accordance with the service bulletin.
2. Alternate methods of compliance with this Airworthiness Directive may be used when they are approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Region.
This amendment becomes effective April 1, 1981, and was effective earlier to those recipients of telegraphic AD T80-26-51, dated December 13, 1980.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 823
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1969 | 1 |
|---|---|
| 1975 | 1 |
| 1979 | 1 |
| 1981 | 1 |
| 1986 | 3 |
| 1987 | 4 |
| 1989 | 2 |
| 1990 | 1 |
| 1991 | 5 |
| 1992 | 4 |
| 1993 | 4 |
| 1994 | 1 |
| 1995 | 3 |
| 1997 | 2 |
| 1998 | 40 |
| 1999 | 87 |
| 2000 | 72 |
| 2001 | 73 |
| 2002 | 10 |
| 2003 | 7 |
| 2004 | 13 |
| 2005 | 14 |
| 2006 | 21 |
| 2007 | 21 |
| 2008 | 26 |
| 2009 | 38 |
| 2010 | 62 |
| 2011 | 21 |
| 2012 | 30 |
| 2013 | 31 |
| 2014 | 23 |
| 2015 | 20 |
| 2016 | 42 |
| 2017 | 72 |
| 2018 | 27 |
| 2025 | 2 |
38 with no year recorded