| AD Number | 61-25-02 | Status | Active |
| Effective Date | December 29, 1961 | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | N/A |
| Product Type | ["Aircraft"] | Product Subtype | ["Large Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | D & R Nevada LLC |
| Model(s) | 22 22M |
61-25-02 CONVAIR: Amdt. 373 Part 507 Federal Register November 29, 1961. Applies to All Model 22 (880) and Model 22M (880M) Aircraft.
Compliance with paragraphs (a) and (b) required within 4,000 hours' time in service after effective date of this directive.
Compliance with paragraph (c) is required on effective date of this directive.
An inflight engine pod explosion occurred on a Model 22 airplane causing the loss of a nose cowl and portions of the side cowl panel doors. This incident has been attributed to an open starter bleed air supply valve causing continued rotation and subsequent overheating and disintegration of the air turbine starter.
The following modifications and procedures are required to prevent the recurrence of this incident:
(a) Provide a FAA approved cockpit indicating means by which it can be determined that each engine starter is de-energized. Approval of this item shall be processed through the FAA, Flight Standards Service, Engineeringand Manufacturing Branch, Western Region.
(b) Concurrently with the incorporation of the modification described in paragraph (a), the Normal Procedures Section of the Models 22 and 22M FAA Approved Airplane Flight Manual, under that portion entitled "Engine Starting Procedure - Ground", shall be revised to include a provision that the flight crew determine that the cockpit indicating means required by paragraph (a) indicates that the starter is de-energized after each engine start.
(c) Pending completion of the modifications required by paragraph (a) of this AD either install placard in the flight compartment on the pilot's start switch panel to read as follows: "Engine ground starts shall be made according to Convair Alert Service Bulletin No. 80-3", or revise the Normal Procedures Section of the Models 22 and 22M FAA Approved Airplane Flight Manual, under that portion entitled "Engine Starting Procedure - Ground", to provide for engine ground starts to be made according toConvair Alert Service Bulletin No. 80-3 or FAA Approved equivalent.
This directive effective December 29, 1961.