AD 97-03-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 727-100 Series | Airworthiness Directives; Boeing Model 727 and 737 Series Airplanes |
| aircraft | The Boeing Company | 727-100C Series | Airworthiness Directives; Boeing Model 727 and 737 Series Airplanes |
| aircraft | The Boeing Company | 727-200 Series | Airworthiness Directives; Boeing Model 727 and 737 Series Airplanes |
| aircraft | The Boeing Company | 727-200F Series | Airworthiness Directives; Boeing Model 727 and 737 Series Airplanes |
| aircraft | The Boeing Company | 727 Series | Airworthiness Directives; Boeing Model 727 and 737 Series Airplanes |
| aircraft | The Boeing Company | 727C Series | Airworthiness Directives; Boeing Model 727 and 737 Series Airplanes |
| aircraft | The Boeing Company | 737-100 Series | Airworthiness Directives; Boeing Model 727 and 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200 Series | Airworthiness Directives; Boeing Model 727 and 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200C Series | Airworthiness Directives; Boeing Model 727 and 737 Series Airplanes |
| aircraft | The Boeing Company | 737-300 Series | Airworthiness Directives; Boeing Model 727 and 737 Series Airplanes |
Unsafe Condition
The fuel cap assembly, due to its design, became loose and allowed fuel to enter the deactivated auxiliary fuel tanks on in-service airplanes.
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Required Actions
Replace the fuel cap assembly with part number AN929L24 on the inlet fitting at the inside top of the auxiliary fuel tank(s). Replace the INOP placards with new placards, following the applicable Boeing Alert Service Bulletin.
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Compliance Time
Within 6 months after the effective date of this AD
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Affected Aircraft
Boeing Model 727 and 737 series airplanes listed in Boeing Alert Service Bulletins 727-28A0062 (Rev.5) and 737-28A1032 (Rev.2), equipped with deactivated Boeing-designed forward and/or aft auxiliary fuel tanks.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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