AD 77-22-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | 1329-23A | LOCKHEED Model 1329-23A, 1329-23D, 1329-23E, and 1329-25 Airplanes |
| aircraft | Lockheed Martin Corporation | 1329-23D | LOCKHEED Model 1329-23A, 1329-23D, 1329-23E, and 1329-25 Airplanes |
| aircraft | Lockheed Martin Corporation | 1329-23E | LOCKHEED Model 1329-23A, 1329-23D, 1329-23E, and 1329-25 Airplanes |
| aircraft | Lockheed Martin Corporation | 1329-25 | LOCKHEED Model 1329-23A, 1329-23D, 1329-23E, and 1329-25 Airplanes |
Unsafe Condition
Failure of the reinforcing doubler and ring segment for the lower VHF antenna.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect for cracks in the reinforcing doubler and ring segment within the next 25 hours flying time. If cracks are found, replace the components before further flight. For Model 1329-23A/D/E without cracks, replace components within 300 hours flying time. Model 1329-25 must replace components within 300 hours flying time.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 25 hours flying time (inspection) and within the next 300 hours flying time (replacement for some models).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lockheed Model 1329-23A (serials 5001-5092, 5094-5096, 5121), 1329-23D (same serials as 23A), 1329-23E (serials 5093, 5097-5120, 5122-5162), and 1329-25 (serials 5201-5221).
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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