AD 60-25-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | 188A | LOCKHEED Model 188 Series Aircraft |
| aircraft | Lockheed Martin Corporation | 188C | LOCKHEED Model 188 Series Aircraft |
Unsafe Condition
Cracked aileron counterweight attaching angles at aileron Stations 13.85, 30.95, 48.01, 82.16, 116.31, 150.46, and 184.61.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect for cracks in the angles attaching the aileron balance-weight brackets to the aileron spar at specified stations every 300 hours' time in service. Replace cracked angles with parts made from 0.090-inch thickness AISI 8630 or 4130 steel meeting specified strength and plating requirements, following Lockheed Process Specifications or FAA-approved equivalents, or per Lockheed Service Bulletin 88/SB-451. Compliance required before further flight if cracks are found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required as indicated. Inspections must be done at intervals not to exceed 300 hours' time in service. Replacement of cracked angles must be made before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lockheed Model 188A and 188C aircraft, 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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.