- Effective
- June 8, 1982
- Models
- BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A, DH.125 Series 1A-522, DH.125 Series 1A/R-522, DH.125 Series 1A/S-522 and 5 more
- Data sheet
- TCDSA3EU
- Registered aircraft
- 4 matched by model
- Product
- Aircraft · Large airplane
- Amendment
- 39-4393
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 January 21, 2026.
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 | 59fc05c5…99a77ea | FAA DRS (API key needed) |
On this page
The airworthiness directive
82-12-03 BRITISH AEROSPACE (Hawker Siddeley): Amendment 39-4393. Applies to all Model HS/BH/DH 125 aircraft up to and including Series 600A aircraft, certificated in all categories, S/Ns as listed in British Aerospace, Aircraft Group, 125 Series Aircraft Service Bulletin 49-23-(6525), Revision 5, dated August 18, 1981. Compliance is required as indicated unless already accomplished. To protect the PE busbar and ensure APU start circuit operation, accomplish the following:
1. Within the next 100 hours time in service after the effective date of this AD, install a 275 ampere airfuse in accordance with the applicable instructions in paragraph 2, "Accomplishment Instructions," of British Aerospace, Aircraft Group, 125 Series Aircraft Service Bulletin (SB) No. 49-23-(6525), Revision 5, dated August 18, 1981.
2. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modificationsrequired by this AD.
3. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Mountain Region.
The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1).
This amendment becomes effective June 8, 1982.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 4
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1968 | 1 |
|---|---|
| 1970 | 1 |
| 1971 | 1 |
1 with no year recorded