AD 90-02-18 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | SOCATA | TB 10 | Airworthiness Directives; SOCATA GROUPE AEROSPATIALE Models TB 9 and TB 10, TB 20, and TB 21 airplanes |
| aircraft | SOCATA | TB 20 | Airworthiness Directives; SOCATA GROUPE AEROSPATIALE Models TB 9 and TB 10, TB 20, and TB 21 airplanes |
| aircraft | SOCATA | TB 21 | Airworthiness Directives; SOCATA GROUPE AEROSPATIALE Models TB 9 and TB 10, TB 20, and TB 21 airplanes |
| aircraft | SOCATA | TB9 | Airworthiness Directives; SOCATA GROUPE AEROSPATIALE Models TB 9 and TB 10, TB 20, and TB 21 airplanes |
Unsafe Condition
Loss of power due to contamination of the fuel system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install applicable SOCATA modification kits 9154 or 9155 within 75 hours time-in-service from February 6, 1990. Replace Dukes fuel pump with Weldon fuel pump and add a check valve for TB 20/SN 1-730 and TB 21/SN 1-730 (unless modified with Modification 66). If parts unavailable, drain fuel tank sump every 50 hours TIS or perform preflight actions per SB 47/1.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 75 hours time-in-service from February 6, 1990
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
SOCATA Models TB 9, TB 10, TB 20, TB 21 (all serial numbers)
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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