AD 85-22-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-100 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200C Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-300 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-400 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-500 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-600 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-700 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-800 Series | BOEING Model 737 Series Airplanes |
Unsafe Condition
Cracking of the body buttock line (BBL) 70.85 rib upper chord which may lead to failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the BBL 70.85 rib upper chord for cracks in accordance with Table I of Boeing Service Bulletin 737-57-1137, Revision 2. Repeat inspections at intervals not exceeding 5,000 landings. Repair cracked parts as specified in the Service Bulletin. Reinspect and repair interim repairs within two years after AD effective date or repair accomplishment, whichever is later. Incorporate Preventative/Special Preventative Modifications to terminate repetitive inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to the accumulation of 10,000 landings or within 180 days or 2,500 landings after the effective date of this AD, whichever occurs later.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 737 series airplanes listed in Boeing Service Bulletin 737-57-1137, Revision 2.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.