The U.S. aircraft register, updated daily
FAA orders · airworthiness directive · current

59-07-05: Oil Cooler Lines Clearance

FAA order 59-07-05 is an airworthiness directive published June 9, 1959. The FAA's subject line: Oil Cooler Lines Clearance. It names Piper PA-24 Comanche: about 2,428 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: other and general.

What it applies to as the FAA lists it

Kind of product
Aircraft
Makes
Piper Aircraft Inc.
Models
PA-24
On this site
Piper PA-24 Comanche 2,428 registered

Dates and paperwork

Published
June 9, 1959 (signed June 3, 1959)
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 (849 characters)
59-07-05 PIPER: Applies to PA-24-180 Comanche Aircraft. Compliance required not later than June 1, 1959. Inspection has shown the clearance between oil cooler lines and exhaust stack is not adequate on some aircraft. Clearance between the lines and the stack should be a minimum of three-eights of an inch. In the event inadequate clearance exists, the oil cooler lines should be reformed or the fittings in the cooler should be repositioned slightly so that proper clearance can be obtained. If necessary, adapters Piper P/N 451 855 (Weatherhead No. 3200 x 6) can be installed between the oil cooler and the oil cooler line fittings. When providing for the proper clearance make certain there is no interference between the oil cooler lines and the cowl. (Piper Service Bulletin No. 167 dated January 6, 1959, covers this item.)

Related safety bulletins advice on the same designs, not orders

2018-11-21SW-18-31 · NAVIGATION, ATTITUDE, AND DIRECTION DATA SYSTEM
2013-05-09NE-13-32 · Propeller Spinner Section
2008-09-17CE-08-50 · Landing Gear Manual Extension System Inspection
2005-07-07CE-05-67 ·
2004-09-15CE-04-88 ·

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/59-07-05.json · aircraft systems.