AD 81-19-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 727-100 Series | BOEING Model 727 Airplanes |
| aircraft | The Boeing Company | 727-100C Series | BOEING Model 727 Airplanes |
| aircraft | The Boeing Company | 727-200 Series | BOEING Model 727 Airplanes |
| aircraft | The Boeing Company | 727-200F Series | BOEING Model 727 Airplanes |
| aircraft | The Boeing Company | 727 Series | BOEING Model 727 Airplanes |
| aircraft | The Boeing Company | 727C Series | BOEING Model 727 Airplanes |
Unsafe Condition
Failure of the Air Flow Multiplier could result in loss of pressurization or structural damage to the airplane.
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Required Actions
Within 300 hours time-in-service after the effective date, begin performing repetitive inspections of the Air Flow Multiplier per Boeing Alert Service Bulletin 727-21A95, repeated every 1000 hours time-in-service. Alternatively, accomplish AiResearch Service Bulletin 21-2291 modification or approved equivalent actions.
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Compliance Time
Within 300 hours time-in-service after the effective date of this AD
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Affected Aircraft
Boeing Model 727 airplanes with Air Flow Multiplier installed through line number 1264 where AiResearch Service Bulletin 21-2291 has not been incorporated
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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