47-47-02: Battery Box Insulating Spacer
FAA order 47-47-02 is an airworthiness directive. The FAA's subject line: Battery Box Insulating Spacer. It names Piper PA-12 Super Cruiser: about 1,247 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: electrical power.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- FS 2003 Corp.
- Models
- PA-12
- On this site
- Piper PA-12 Super Cruiser 1,247 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 (1,088 characters)
47-47-02 PIPER: (Was Mandatory Note 6 of AD-780-3.) Applies to PA-12 Aircraft Serial Numbers 12-1 to 12-796 Inclusive, 12-815, 12-817 to 12-822 Inclusive, 12-825 to 12-831 Inclusive, 12-833, 12-835 to 12-848 Inclusive, 12-863 to 12-893 Inclusive, 12-895 to 12-901 Inclusive.
Compliance required as soon as practicable but not later than January 15, 1948.
To eliminate the possibility of a short circuit occurring between the battery terminal bases and the battery box, a wood filler block 1/4 inch x 1 1/2 inches x 10 inches (Piper P/N 11367) should be fastened to the upper inside edge of the battery box with two No. 6-32 x 1/2 flat head machine screws. Any insulating spacer which will accomplish this same objective may also be used. On completion of this change appropriate entry shall be made in the aircraft log book.
If the Reading R24L Battery has been replaced with an S24 Battery and proper spacer channels (Piper P/N 10926 and 10927) are installed, the above changeis unnecessary.
(Piper Service Bulletin No. 98 dated July 28, 1947, covers this same subject.)
Related safety bulletins advice on the same designs, not orders
2018-11-21SW-18-31 · NAVIGATION, ATTITUDE, AND DIRECTION DATA SYSTEM
1998-10-21ACE-99-01 ·
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/47-47-02.json · aircraft systems.