- Effective
- October 14, 1982
- Models
- MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-30, MU-2B-36
- Data sheet
- TCDSA2PC
- Registered aircraft
- 43 matched by model
- Product
- Aircraft · Small airplane
- Amendment
- 39-4472
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 21 KB | cdb15720…b32f9cd | FAA DRS (API key needed) |
On this page
The airworthiness directive
82-21-03 MITSUBISHI HEAVY INDUSTRIES, LTD., (MHI): Amendment 39-4472. Applies to MU-2B/-10/-15/-20/-25 (Serial Numbers 005 thru 238), MU-2B-30 (Serial Numbers 502 thru 547), and MU-2B-36 (Serial Number 501) airplanes certificated in any category. (This AD does not apply to MU-2B airplanes having serial numbers with the suffix "SA.")
COMPLIANCE: Required as indicated unless already accomplished.
To ensure correct engine fire detection and DC power emergency relay wiring, within the next 25 hours time-in-service after the effective date of this AD, accomplish the following: a) Inspect and, if necessary, repair the engine fire detecting and DC power emergency relay circuits as prescribed in Sections I and II of MHI Service Bulletin 187, dated May 27, 1982.
b) Aircraft may be flown in accordance with FAR 21.197 to a maintenance facility where this inspection can be accomplished.
c) An alternate means of compliance with this AD may be used when approved by the Manager,Honolulu Aircraft Certification Field Office, Northwest Mountain Region, Federal Aviation Administration, 300 Ala Moana Boulevard, Honolulu, Hawaii 96850.
This amendment becomes effective on October 14, 1982.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 43
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1968 | 1 |
|---|---|
| 1969 | 5 |
| 1970 | 1 |
| 1971 | 1 |
| 1972 | 3 |
| 1973 | 6 |
| 1974 | 11 |
| 1975 | 1 |
| 1976 | 2 |
12 with no year recorded