F-104G 20+52 Jagdbombergeschwader 31 (JaboG 31) 1968

F-104G, construction number 683-2060, company model 683-10-19, built by Lockheed
manufactured by Group USA (ARGE-USA); Lockheed assembly in Fighterbomber version according contract lot 6
flight test release January 29, 1962; test flights with register number coded "160" only
KF+135 airlifted to Messerschmitt-Manching May 22, 1962 with 23 flight hours in a Canadair CL-44D airfreighter of "Flying Tiger Line"
test flight by Messerschmitt on July 9, 1962; acceptance date August 7, 1962 in Fighterbomber version by BABwMTT; project "Replace" was not implemented
DA+257 JaboG 31 at Norvenich AB delivery date on August 7, 1962 in Silver-finish colors
project "19" upgrading in order to get all Norvenich aircraft to the same modification level starting in January 1963
March 14, 1963 renumbered DA+237 after the upgrading, aircraft was modified to such an extent that it received a new tactical code
SABCA for IRAN September 9, 1965 with 447 flight hours, back to JaboG 31 on July 14, 1966; NATO exercise "Tactical Weapons Meet" 1967 at RAFG Wildenrath in June 1967
20+52 camouflage scheme "Norm 62" according tech order "TA-196"; SABCA for IRAN November 13, 1968 with 1.058 flight hours, back to JaboG 31 on May 22, 1969
crashed on November 12, 1970 during practice weapons delivery at Helchteren Range, Belgium
after exceeding the aircraft limits and resulting in loss of control (CFIT); pilot was killed; struck off charge order (AVA) May 3, 1971.

copyright © Frank Matthes

Project "19"
After completion of the "Replace" project, LAAO (Lockheed Advisory Office) personnel in Nörvenich inspected all Lockheed aircrafts to determine the modification status. 
It turned out that there was still no uniform configuration "2056D" achieved. According to the latest Lockheed construction documents, which apparently only the LAAO submitted, 
up to 60 SB's (Service Bulletins) were missing on the individual aircraft. There is an LAAO report from 14.10.1962.
It was therefore decided that the affected 19 F-104G should be retrofitted again by staff of Heinkel from Speyer at Nörvenich. With the instruction of the BWB FS 173/51315 of 30.10.1962 this action was initiated. 
But for the reasons already mentioned, this work could not begin until January 1963.
The following aircrafts were re-modified again: factory numbers: 2043, 2044, 2046 - 2049, 2053 - 2058, 2060 - 2066.

8 aircrafts were changed to such an extent that they received a new tactical code:
2049 - DA+253 to DA+232
2057 - DA+122 to DA+112
2058 - DA+254 to DA+234
2060 - DA+257 to DA+237
2061 - DA+258 to DA+240
2062 - DA+129 to DA+119
2063 - Da+259 to DA+239
2066 - DA+126 to DA+120

10 of these Project "19" aircraft took part in the "Category III" tests: 2043, 2044, 2046, 2047, 2048, 2053, 2054, 2055, 2056, 2057. "Category III" were tests of operational mission profiles and system tests from April until July 1963.