AD 85-01-06
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 frames adjacent to the forward airstair can result in sudden loss of cabin pressure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect frames 351.2 and 360 for cracks in accordance with Boeing Service Bulletin 737-53A1064. Repeat inspections at intervals not exceeding 3000 or 6000 landings depending on airplane group. Repair cracks before further flight per the Service Bulletin. Operators may alternatively inspect external skin every 300 landings until internal inspections are done within 3000 flight cycles.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to accumulation of 29,000 landings, or within 90 days from 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 certificated in all categories listed in Boeing Service Bulletin 737-53A1064, Revision 3.
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.