| AD Number | 77-21-09 | Status | Active |
| Effective Date | November 25, 1977 | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | 39-3059 |
| Product Type | ["Aircraft"] | Product Subtype | ["Large Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Lockheed Martin Corporation |
| Model(s) | 188A 188C |
77-21-09 LOCKHEED-CALIFORNIA COMPANY: Amendment 39-3059. Applies to Model 188A and 188C airplanes, certificated in all categories.
Compliance is required within 100 hours additional time in service after the effective date of this AD, unless already accomplished.
To prevent possible jamming of the aileron/rudder remove the aileron rudder balance interconnect mechanism, in accordance with instructions given in Lockheed Electra Service Bulletin Alert 88/SB-698, dated September 12, 1977, or later FAA approved revision.
This amendment becomes effective November 25, 1977.