AD 2011-12-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company Model 727 | Airworthiness Directives; The Boeing Company Model 727, 727C, 727-100, 727-100C, 727-200, and 727-200F Series Airplanes |
Unsafe Condition
Potential ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.
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Required Actions
Replace existing unshielded fuel quantity indication system (FQIS) wire bundles with double shielded FQIS wire bundles, install a new wire feed-through fitting, and ground the wire shields as applicable. Perform repetitive low frequency eddy current (LFEC) inspections for fuselage skin cracking and take corrective actions if necessary. Revise the maintenance program to incorporate certain airworthiness limitations.
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Compliance Time
Within 12 months of effective date
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Affected Aircraft
The Boeing Company Model 727, 727C, 727-100, 727-100C, 727-200, and 727-200F series airplanes, all variable numbers, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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