F-104G 20+42 JaboG 31 "Boelcke" after a "Low-Approach" at Norvenich AB in January 1973

F-104G, construction number 683-2049, company model 683-10-19, built by Lockheed
manufactured by Group USA (ARGE-USA); assembly in Fighterbomber version according contract lot 5 at Lockheed-Palmdale
flight test release January 29, 1962; coded with register number "149" for test flights; acceptance date by BABwLockheed March 31, 1962; coded KF+125 for tests of NASARR radar at Palmdale
airlifted to Manching April 26, 1962 with 19 flight hours in a Canadair CL-44D airfreighter of "Flying Tiger Line"; project "Replace" was not implemented
DA+253 JaboG 31 at Norvenich AB delivery date on July 23, 1962 in Silver-finish colors
project "19" upgrading in order to get all Norvenich aircraft to the same modification level starting in January 1963
DA+232 recoded in March 1963 after the upgrading; aircraft was modified to such an extent that it received a new tactical code
DA+232 had a severe incident at Norvenich AB on April 22, 1964 after chute and brake failure during landing, pilot was not hurt, but the aircraft spend quite a time in the repair shop,
before it was delivered to Messerschmitt on October 15, 1964 for modifications and camouflage scheme "Norm 62" according tech order "TA-196"
it returned to service with JaboG 31 "B" on June 28, 1965
20+42 SABCA for IRAN on January 28, 1969 with 888 flight hours, back to JaboG 31 on April 23, 1969; JaboG 32 at Lechfeld AB on August 11, 1969
JaboG 31 on October 26, 1970; made an emergency-landing at Leeuwarden AB with an open nozzle on August 27, 1979
after the pilot encountered an exploded M61 gun bullet; withdrawn from use at JaboG 31 on April 30, 1980
instructional airframe (GIA) at Norvenich AB April 30, 1980; BDRT airframe at Norvenich September 27, 1983; struck off charge order (AVA) September 27, 1983; scrapped in 1993.

copyright © @ Heribert Mennen

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.