AD 85-12-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-100 Series | BOEING Model 737-100 and -200 Series Airplanes |
| aircraft | The Boeing Company | 737-200 Series | BOEING Model 737-100 and -200 Series Airplanes |
Unsafe Condition
Engine flameouts during climb due to incompatible fuel types in airplanes equipped with Plessey Type 8240 Mark 1, 2, or 3 boost pumps.
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Required Actions
Ensure use of Jet A/A1 (ASTM-D-1655) or JP-5 (MIL-T-5624) fuel before further flight. Incorporate approved fuel information into the Airplane Flight Manual within 48 hours. Alternate compliance may be approved by the FAA Manager, Seattle Aircraft Certification Office.
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Compliance Time
Before further flight (for fuel use) and within 48 hours (for AFM update).
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Affected Aircraft
Boeing Model 737-100 and -200 series airplanes with Plessey Type 8240 Mark 1, 2, or 3 boost pumps.
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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