53-12-02: Hydraulic Hand Pump Seals
FAA order 53-12-02 is an airworthiness directive. The FAA's subject line: Hydraulic Hand Pump Seals. It names Dehavilland DHC-2: about 255 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: heating, ice protection and utility systems.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Viking Air Limited
- Models
- DHC-2 Mk.I, DHC-2 Mk.II, DHC-2 Mk.III
- On this site
- Dehavilland DHC-2 255 registered
Dates and paperwork
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (735 characters)
53-12-02 de HAVILLAND: Applies to Model DHC-2 (Beaver) Aircraft, Serial Numbers 1 to 451 Inclusive.
Compliance required as indicated.
Cases have been reported of loss of seals in the flap hydraulic hand pump No. 430RDH. To prevent the above condition a modification (No. 2/926) was incorporated on production aircraft and should be incorporated on aircraft in service as soon as possible but not later than the next 100 hours.
The FAA concurs in this mandatory action by the Canadian Department of Transport.
(de Havilland Technical News Sheet, Series B, No. 63 dated March 19, 1953, available from de Havilland Aircraft of Canada, Ltd., Toronto, Ontario, Canada, covers this same subject and describes method of repair.)
Related safety bulletins advice on the same designs, not orders
2018-11-21SW-18-31 · NAVIGATION, ATTITUDE, AND DIRECTION DATA SYSTEM
2005-11-18CE-06-10 ·
2003-05-14CE-03-36 ·
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/53-12-02.json · aircraft systems.