- Effective
- December 13, 1960
- Models
- 188A, 188C
- Data sheet
- TCDS4A22
- Registered aircraft
- 4 matched by model
- Product
- Aircraft · Large airplane
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 19 KB | 903f4f77…1acf18d | FAA DRS (API key needed) |
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The airworthiness directive
60-24-01 LOCKHEED: Amdt. 222 Part 507 Federal Register November 15, 1960. Applies to All 188 Aircraft.
Compliance required within 5,000 hours' time in service after the effective date of this directive.
To provide protection against possible over-pressurization of fuel tanks during refueling, the following modification is required unless already accomplished:
Install pressure relief overflow valves in each fuel tank. Lockheed overflow valves P/N 634114-7 or -9 are satisfactory for this purpose. (Lockheed Service Bulletin 188/SB-422 covers this subject.)
This directive effective December 13, 1960.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 4
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1959 | 2 |
|---|---|
| 1960 | 1 |
1 with no year recorded