- Effective
- January 12, 1978
- 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 6 more
- Data sheet
- TCDSA3EU
- Registered aircraft
- 26 matched by model
- Product
- Aircraft · Large airplane
- Amendment
- 39-3108
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.
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|---|---|---|---|
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On this page
The airworthiness directive
78-01-06 HAWKER SIDDELEY AVIATION, LIMITED: Amendment 39-3108. Applies to Model DH/BH/HS-125 airplanes, certificated in all categories.
Compliance is required as indicated unless already accomplished.
To prevent possible detachment of the bolts securing the elevator control pulley bracket to the aircraft structure, accomplish the following:
(a) For BH/HS-125-600A aircraft, within 10 hours time in service after the effective date of this AD, replace the four bolts attaching the elevator control pulley bracket to the top of fin rear spar with 25-6CF 519 or NAS 1304-10H bolts and safety wire replacement bolts in pairs all in accordance with the section entitled "Accomplishment Instructions" of Hawker Siddeley Aviation, Ltd., Modification Service Bulletin 27-122(2578), dated March 31, 1977, or an FAA-approved equivalent.
(b) For all other DH/BH-125 aircraft, within 100 hours time in service after the effective date of this AD, replace the four bolts attaching the elevator control pulley bracket to the top of the fin rear spar in accordance with Paragraph (a) of this AD.
This amendment becomes effective January 12, 1978.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 26
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 |
| 1977 | 1 |
| 1978 | 1 |
| 1980 | 2 |
| 1981 | 1 |
| 1982 | 5 |
| 1984 | 1 |
12 with no year recorded