I'm just not convinced that "not having one" is the same as "not needing one". And I apologize for coming across rather stubbornly, but I've seen my fair share of airplanes that were missing documents or equipment that turned out to be required (and definitely safety related in several cases), and there's been more than once where the only reason somebody actually investigated it was to get me off their back. If you can imagine.
I went back this morning and re read through the historical FAR's and found this:
[FONT="][Federal Register: January 16, 1978 (Volume 43, Number 10)]
[Page 2302]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Parts 21, 23, 25, 27, and 29
[Docket No. 14684 and 14324; Amendment Nos. 21-46, 23-21, 25-42, 27-14, 29-15][/FONT][FONT="]
Airworthiness Review Program; Amendment No. 6: Flight Amendments
[/FONT]
PART 21 - CERTIFICATION PROCEDURES FOR PRODUCTS AND PARTS
3. By adding a new Sec. 21.5 following Sec. 21.3 to read as follows:
Sec. 21.5 Airplane or Rotorcraft Flight Manual.
(a) With each airplane or rotorcraft that was not type certificated with an Airplane or Rotorcraft Flight Manual and that has had no flight time prior to March 1, 1979, the holder of a Type Certificate (including a Supplemental Type Certificate) or the licensee of a Type Certificate shall make available to the owner at the time of delivery of the aircraft a current approved Airplane or Rotorcraft Flight Manual.
(b) The Airplane or Rotorcraft Flight Manual required by paragraph (a) of this section must contain the following information:
(1) The operating limitations and information required to be furnished in an Airplane or Rotorcraft Flight Manual or in manual material, markings, and placards, by the applicable regulations under which the airplane or rotorcraft was type certificated.
So by reading the above, then you go to CAR-3 where the airplane was originally certified and it reads:
Car 3.777 (b) For airplanes having a maximum certificated weight of 6,000 pounds or less an Airplane Flight Manual is not
required; instead, the information prescribed in this part for inclusion in the Airplane Flight Manual shall be made
available to the operator by the manufacturer in the form of clearly stated placards, markings, or manuals.
So as in the case of the Maule, they decided to go with a manual and have it FAA Approved. Other manufacturers decided to go with placards and markings and issue a Pilot Operating Handbook.
I had a 1957 PA22/20-150. The Pacers and TriPacers never had a POH issued from Piper until years later and it was a very weak book to say the least. I found an old PA28-151 POH I had laying around and it clearly states "For Information Purposes Only" and doesn't have any FAA Approval.
My Cessna 310Q was a 1972 Model and it only had a POH (not FAA Approved) but it did have an equipment list from Cessna.
My 1974 Cessna 337G Skymaster, which was certified under FAR 23 has a "Owner's Manual", not FAA approved and no equipment list.
Spoke with a Tech Rep from Piper this morning about the subject. Seems over the years Piper tried a bit of everything, but she did say under CAR-3 for all models up to the PA23-235 that Piper used a "Operation Limitations Certificate" to comply. That's the little placard you see in the airplane that has limitations, airspeeds, approved for day/night/ifr/vfr, etc. Later on she said Piper came up with a "POM", a Piper's Operating Manual which is essentially a POH and AFM combined. I asked her about Equipment List and she said back 30+ years ago (pre 1979) that they did use an equipment list, but not always. She agreed with me on the read of CAR-3 and 21.5 for the pre 1979 planes but did add that if anyone wanted they could do a historical search on their serial number for factory documentation.
So, in my opinion aircraft that had no flight time prior to March 1, 1979 and were not originally issued an FAA Approved Flight Manual or an equipment list are not required to have it.
YMMV