AD 92-19-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 727-100 Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-100C Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-200 Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-200F Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727 Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727C Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
Unsafe Condition
Cracks in the pressure floor adjacent to BS 950, outboard of BL 50, which could lead to loss of cabin pressurization.
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Required Actions
Perform detailed visual, high frequency eddy current, or dye penetrant inspections for cracks in the pressure floor as specified in Boeing Service Bulletins 727-53-149/0149, revisions 2-4. Repeat inspections at intervals of 4,000 or 5,000 landings depending on inspection technique. Repair cracks within limits using interim or permanent repairs, and replace interim repairs within 600 landings. Replace blind fasteners within 10,000 landings and inspect at intervals not exceeding 2,500 landings. Permanent repairs or modifications terminate inspection requirements.
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Compliance Time
Prior to the accumulation of 30,000 or 20,000 landings (depending on airplane group) or within 2,500 landings after specified dates, whichever occurs later. For subsequent inspections, within 4,000 or 5,000 landings after previous inspection.
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Affected Aircraft
All Model 727 series airplanes, certificated in any category, with line numbers 001 through 1432, Group 2 as per Boeing SB 727-53-0149 Rev 3, and those modified per SB 727-53-149 Rev 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
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