AD 91-22-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-100B Long Body | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-100B Short Body | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-200 | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-300 Series | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-300B Series | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-300C Series | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-400 Series | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 720 Series | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 720B Series | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
Unsafe Condition
Inadvertent opening of the main cargo door due to improper engagement of the latching cams and wear of the mating surfaces of the pressure relief door hinge fittings and latch cams.
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Required Actions
Within 30 days after the effective date, revise operating procedures to include a pre-takeoff visual verification of door latching via external viewports and relay confirmation to flight crew. Within 18 months, inspect for wear on door components and replace worn parts as specified. Within 36 months, replace latch cams, bellcranks, hinge fittings, and perform system tests.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 30 days after the effective date of this AD, within the next 18 months after the effective date, and within 36 months after the effective date.
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Affected Aircraft
Boeing Model 707/720 series airplanes with a main cargo door listed in Boeing Service Bulletin 3477 (dated July 26, 1990), and Models 727-100C and 727-200F series listed in Boeing Service Bulletin 727-52-0142 (dated July 26, 1990).
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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