CHECO Report September 1970, Page 8

CHAPTER TWO

MAINTENANCE FOR DEPLOYED AIRCRAFT

Maintenance of aircraft of the 360th TEWS created no complications, since the parent organization's 460th Field Maintenance Squadron and 460th Avionics Maintenance Squadron were stationed at Tan Son Nhut AB, where they were charged with maintenance of all base aircraft. Between them the two squadrons were equipped for the inspection, repair, tech order compliance, and, in some cases, fabrication of airframes, fuel systems, pneumatics, ECM, navigation and communications equipment, and Doppler systems, among others. The 460th maintenance vacilities did not perform IRAN on corrosion control as a major function, nor did these squadrons maintain or perform modifications on the special USAFSS equippment in the back of the aircraft. This work was accomplished by AFSS personnel and/or technicians employed by Sanders Associates, the developers of the ARDF system. The KY-8 secure voice system ans associated communications maintenance was performed by the 1876th Communications Squadron at Tan Son Nhut.

At Phu Cat, the maintenance support for the 361st TEWS was accomplished by the 37th Field and Avionics Squadrons, as far as the aircraft themselves were concerned. Maintenance on special back end electronics equipment was performed by AFSS personnel: KY-8 maintenance by the 1883rd Communications Squadron.

When the 362nd TEWS was based at Pleiku, significant downtime was experienced with the EC-47Q aircraft. Primary cause for the lonk downtime - and this was true of all "Q" aircraft - was the time required to change an engine. Engines, accessories, and propellers were not available at Pleiku. As a result, when an engine change became necessary, the engine had to be removed from the aircraft and flown to Cam Ranh Bay, where it was rebuilt and then flown back to Pleiku to be mounted. This process took from ten to fifteen days. In addition, the 362nd did not have an in-house capability to work propellers; consequently, these also had to be sent to Cam Ranh Bay.

The deployment to Da Nang solved this particular problem. The 366th Field Maintenance Squadron performed engine and propeller change for the R-2000-4 as well as the normal maintenance functions performed at Phu Cat and Tan Son Nhut. Special equipment, as well as cryptological and communications systems, received maintenance by AFSS and AFSC respectively, as at the other bases.

The situation at Nakhon Phanom (NKP) was different. The 56th Special Operations Wing could provide only minor maintenance on the EC-47's. The five aircraft were on the 360th UE and necessarily rotated back to Tan Son Nhut on a regular basis for phase inspection and major maintenance, scheduled or unscheduled, as well as time compliance tech order (TCTO) work. The aircraft remained at Nakhon Phanom for 21 days or 100 flying hours, whichever occured sooner, then returned to Tan Son Nhut. Until around the end of June 1970, the return trips were made via Don Muang Airfield, Thailand, and the "Bamboo Route" across the Gulf of Siam. After the fall of the Sihanouk government in Cambodia allowed the use of the airspace over that nation, to-and-from flights were fragged for missions transiting Cambodia between Nakhon Phanom and Tan Son Nhut.

Only eight of the 360th TEWS aircraft were used in the NKP rotation - all of these being ALR-34-configured to avoid complicated maintenance - because mission priority required CCZ-configured EC-47's (aircraft containing two extra collection consoles). The planes normally remained at Tan Son Nhut for five days, during which AFSS technicians repaired, tuned, and "peaked out" their special equipment; the same schedule was applied to the KY-8, cryptological, and associated communications equipment.

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