AD 88-21-03 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | The Boeing Company | A300 B2-1A | Airworthiness Directives; AIRBUS INDUSTRIE AND BOEING Airbus Model A300 and A310-200 and Boeing Models 737-200, 737-300, 757-200, 767-200, and 767-300 Series Airplanes |
| aircraft | Airbus | The Boeing Company | A300 B2-1C | Airworthiness Directives; AIRBUS INDUSTRIE AND BOEING Airbus Model A300 and A310-200 and Boeing Models 737-200, 737-300, 757-200, 767-200, and 767-300 Series Airplanes |
| aircraft | Airbus | The Boeing Company | A300 B2-203 | Airworthiness Directives; AIRBUS INDUSTRIE AND BOEING Airbus Model A300 and A310-200 and Boeing Models 737-200, 737-300, 757-200, 767-200, and 767-300 Series Airplanes |
| aircraft | Airbus | The Boeing Company | A300 B2K-3C | Airworthiness Directives; AIRBUS INDUSTRIE AND BOEING Airbus Model A300 and A310-200 and Boeing Models 737-200, 737-300, 757-200, 767-200, and 767-300 Series Airplanes |
| aircraft | Airbus | The Boeing Company | A300 B4-103 | Airworthiness Directives; AIRBUS INDUSTRIE AND BOEING Airbus Model A300 and A310-200 and Boeing Models 737-200, 737-300, 757-200, 767-200, and 767-300 Series Airplanes |
| aircraft | Airbus | The Boeing Company | A300 B4-203 | Airworthiness Directives; AIRBUS INDUSTRIE AND BOEING Airbus Model A300 and A310-200 and Boeing Models 737-200, 737-300, 757-200, 767-200, and 767-300 Series Airplanes |
| aircraft | Airbus | The Boeing Company | A300 B4-2C | Airworthiness Directives; AIRBUS INDUSTRIE AND BOEING Airbus Model A300 and A310-200 and Boeing Models 737-200, 737-300, 757-200, 767-200, and 767-300 Series Airplanes |
| aircraft | Airbus | The Boeing Company | A310-203 | Airworthiness Directives; AIRBUS INDUSTRIE AND BOEING Airbus Model A300 and A310-200 and Boeing Models 737-200, 737-300, 757-200, 767-200, and 767-300 Series Airplanes |
| aircraft | Airbus | The Boeing Company | A310-221 | Airworthiness Directives; AIRBUS INDUSTRIE AND BOEING Airbus Model A300 and A310-200 and Boeing Models 737-200, 737-300, 757-200, 767-200, and 767-300 Series Airplanes |
| aircraft | Airbus | The Boeing Company | A310-222 | Airworthiness Directives; AIRBUS INDUSTRIE AND BOEING Airbus Model A300 and A310-200 and Boeing Models 737-200, 737-300, 757-200, 767-200, and 767-300 Series Airplanes |
Unsafe Condition
Failure of the fuel crossfeed valve during a single engine diversion on an extended range flight could result in inability to stay within the airplane lateral imbalance limit or fuel starvation in the operating engine before reaching the diversion airport.
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Required Actions
Revise the LIMITATIONS SECTION of the FAA-approved Airplane Flight Manual (AFM) or Flight Manual Appendix by adding instructions for an operational check of the fuel crossfeed valve during the last hour of cruise flight during each extended range operation. Repair or replace any fuel crossfeed valve system component not exhibiting proper operation prior to next flight.
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Compliance Time
within 30 days after the effective date of the AD, unless previously accomplished
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Affected Aircraft
Airbus Model A300 and A310-200 series airplanes, and Boeing Models 737-200, 737-300, 757-200, 767-200, and 767-300 series airplanes certificated for operations over routes farther than one hour flying time at normal one-engine inoperative cruise speed from an adequate airport in extended range operations.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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