Quoted:Actually...
The history on this one is "convoluted".
This is what I can gather...
It was originally built as a USAAF Douglas C-47B-DK, USAAF Serial Number 43-49616, manufacturers construction number 15432.
Built by Douglas in Oklahoma City, OK.
It was accepted by the USAAF in Dec 1944 and went to the US Navy as an R4D-6 in Dec 1944 as BUNO 50822.
(My normal sources seem to confirm this)
(First cock-up - The R4D-6 was built at the Long Beach, California plant, were identical to the R4D-5 but were equipped with two 1,200 hp Pratt & Whitney R-1830-90C engines with two-stage, two-speed superchargers, provisions for fuel tanks in the fuselage and improved heaters. These aircraft had been developed for high-altitude flights over the "Hump" in the China-Burma-India (CBI) Theater. The superchargers were removed after World War II. Aircraft remaining in the inventory in 1962 were redesignated C-47Js.)(Was it an R4D-7? - These aircraft, built at the Oklahoma City, Oklahoma plant, were C-47B-DKs converted to navigational trainers and were redesignated TC-47Ks in 1962.)It went to VR-3 at NAS Olathe, KS in Dec 1944.
From there it went to NAS Jacksonville, FL in Jun 46.
From there it went to NART Squantum, MA in Dec 46.
It was then modified to R4D-6R specs (converted to a 21-seat passenger transport).
The Douglas Constructors Number changed from 15432 to 26877.
From there its history is unknown.
It was redesignated from an R4D-6R to a TC-47J in 1962.
In Feb of 1966 it was listed for sale at NAF Litchfield Park, AZ (NAF Litchfield Park was the Navy's boneyard until 1968 when the DOD transferred all Military aircraft for storage to Davis-Monthan).
It was bought and modified by North Central Airlines to DC-3C airliner configuration specs and registered as FAA N-Number N2400.
It was then registered to CD Stoltzfus & Assocs, Coatesville, PA in April of 1966.
In May 1984 it was sold to Missionary Flights and Services Inc, Fort Pierce, FL changing the FAA N-Number to N2400F.
In April 2015 it was sold to Kingdom Air Corps Inc, Sutton, AK keeping the FAA N-Number N400MF.
In July 2021 it was sold to N400M LLC, Anchorage, AK keeping the FAA N-Number N400MF.
YMMV, I could be wrong.