- Models
- D.H. 104 Dove Series 1A, D.H. 104 Dove Series 2A, D.H. 104 Dove Series 5A, D.H. 104 Dove Series 5BA, D.H. 104 Dove Series 6A, D.H. 104 Dove Series 6BA and 4 more
- Data sheet
- TCDSA-807
- Registered aircraft
- 3 matched by model
- Product
- Aircraft · Small airplane
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 | 20 KB | edff5ed1…952a89d | FAA DRS (API key needed) |
On this page
The airworthiness directive
56-11-01 de HAVILLAND: Applies to All Model 104 "Dove" Aircraft.
Compliance required by May 31, 1956.
As a result of the two accidents caused by pilots feathering the wrong propeller after engine failure, the British Air Registration Board has classified the following as an essential modification. The FAA concurs.
The left-hand needle (oil pressure) of the combined oil pressure and temperature gage for the starboard engine could be mistakenly interpreted as applying to the port engine. To minimize the possibility of such confusion either Part A or part B of Dove Modification 879 must be incorporated as soon as possible but not later than May 31, 1956:
Part A. To turn the instruments clockwise through 90 degrees and put temporary markings on the instrument bezel.
Part B. To turn the instruments clockwise through 90 degrees and re-mark the dials to give correct presentation or to fit modified instruments with vertical lettering and figures.
(Dove Modification 879 is covered in de Havilland Service Technical News Sheet Series CT (104) No. 132 dated April 13, 1956.)
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 3
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.