| AD Number | 74-26-10 | Status | Active |
| Effective Date | December 26, 1974 | Issue Date | December 11, 1974 |
| Docket Number | Unknown | Amendment | 39-2053 |
| Product Type | ["Aircraft"] | Product Subtype | ["Small Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | --- - _EMPTY_ |
| Citation | This information is not available. | ||
| Manufacturer(s) | Piper Aircraft Inc. |
| Model(s) | PA-31 PA-31-300 PA-31-350 PA-31P |
74-26-10 PIPER AIRCRAFT: Amendment 39-2053. Applies to Magneto Switch Guard Installation on Piper PA-31 and PA-31-300 S/N 31-2 to 31-7300969 incl; PA-31-350 S/N 31- 5001 to 31-7305091 incl; and PA-31P S/N 31P-1 to 31P-7300161 incl.
To prevent inadvertently or accidentally shutting down an engine, perform the following:
1. Within the next 100 hours time in service, after the effective date of this Airworthiness Directive, install a protective guard over the magneto switches in accordance with Piper Service Letter No. 675, dated September 17, 1973.
2. Equivalent installations must be approved by the Chief, Engineering and Manufacturing Branch, Eastern Region, Jamaica, New York.
3. Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the compliance time specified in this A.D.
This amendment is effective December 26, 1974.