EasyUS Military Aircraft since 1909 by Swanborough and Bowers tells us 17 J-4Es became L-4Es.
Their serials were:
42-79555, 43-2941, 43-2954/2958, 42-2973/2974, 43-2989/2990 and 43-3003/3008.
You indicate your aircraft is a J-4A, so that may be the end of your search for a military serial since multiple sources indicate only J-4Es were impressed. That does make sense since the J-4Es had the largest engine available in the type....a 75hp Continental A-75-9.
(However,
Piper Aircraft and their forerunners by Peperell and Smith say one J-4A ....was impressed as a (U)C-83B. (The UC-83 was an impressed J-5). However, they Also say only 15 J-4s became L-4Es.
So make of it what you will).
If your a.c. was a J-4E at one time, or just want to be sure it was not drafted, then you have to go to Braugher's website and look up each serial number or batch:
An example for the final batch of a.c. you will find:
43-3003/3008 Piper L-4E Grasshopper
J-4E Cubs impressed by USAAF from civilian users
3003 MSN 4-1644
3004 MSN 4-1608
3005 MSN 4-1637. 1064th School Squadron, Fort Sumner, NM; damaged when nosed under landing at Fort Sumner, NM 28Oct42.
3006 MSN 4-1633
3007 MSN 4-1638
3008 MSN 4-1627
If you know your MSN, and you should, you can determine its AAF wartime serial.
Then get the aircraft card through the usual sources.
If none of the serials matches your MSN, then it was not impressed.
But that doesn't mean it wasn't used by the CAP.
Perhaps the CAP history office has a record of aircraft flown? But since many, if not most CAP as were privately owned and just volunteered for service, I would not get my hopes up.
Just be thankful the AAF didn't impress more Cub Coupes!
Last edited by
JohnB on Mon Jul 25, 2022 8:52 pm, edited 3 times in total.