Narrative:

When the aircraft arrived; I went to flight deck to debrief crew while my partner performed post flight walk around. Crew reported all three engines remained at flight idle until shutdown. Note: at this time my partner reported panel missing at # 1 forward fuel boost pump and an engineering authorization (east.a.) was initiated. Upon visual inspection of flight deck I found 'eng grd/flt idle cont' circuit breaker (C/B) (B1-1270) open [popped]. At this point I conferred with maintenance control/engine group with my findings; and generated dc-10 maintenance manual (MM) 73-20-03-2 and dc-10 systems schematic manual (ssm) 73-00-0; page 101 for troubleshooting procedures. In accordance with (in accordance with) dc-10 ssm 73-00-0; disconnected # 1 eng flt/grd [ground] idle solenoid cannon plug to isolate malfunctioned solenoid. When attempting to close eng grd/flt idle control C/B; the C/B continued to pop. I then disconnected # 3 engine flt/grd idle solenoid cannon plug to isolate it. I then was able to successfully close the eng grd/flt idle cont. C/B. In accordance with dc-10 MM 73-20-03-2; I secured # 1 engine flt/grd idle solenoid cannon plug and verified audible click of solenoid when energized. C/B remained closed. When attempting to verify # 3 engine solenoid by re-securing cannon plug; the 'eng grd/flt idle cont C/B popped. At this time I determined # 3 engine grd/ flt idle solenoid to be bad. I conferred findings with maintenance control engine group and agreed to MEL # 3 engine in accordance with MEL 73-21-01-01. I then complied with MEL maintenance procedures. At engine start; flight crew confirmed engine # 3 started in flight idle and # 1 and # 2 engines started in normal grd idle. Multiple events occurred and there were many details that needed attention; in addition to several interested parties wanting answers at the same time. I complied with required maintenance procedures; but failed to include description/explanation in the aircraft logbook. Taking one step at a time would assure all pertinent information is included in the logbook despite the pressing estimated time of departure (ETD).

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Original NASA ASRS Text

Title: A Lead Mechanic was informed he had not provided enough information in the logbook and maintenance computer to explain the cause of an 'Eng Grd/Flt Idle Cont' Circuit Breaker (C/B) to open (pop) on a DC-10 aircraft and justify deferring # 3 Engine's Main Engine Control (MEC) GRD/Flt Idle solenoid. All three engines had defaulted to the Flight Idle mode on landing.

Narrative: When the aircraft arrived; I went to flight deck to debrief crew while my partner performed post flight walk around. Crew reported all three engines remained at Flight Idle until shutdown. Note: At this time my partner reported panel missing at # 1 forward fuel boost pump and an Engineering Authorization (E.A.) was initiated. Upon visual inspection of flight deck I found 'Eng Grd/Flt Idle Cont' Circuit Breaker (C/B) (B1-1270) open [popped]. At this point I conferred with Maintenance Control/Engine group with my findings; and generated DC-10 Maintenance Manual (MM) 73-20-03-2 and DC-10 Systems Schematic Manual (SSM) 73-00-0; Page 101 for Troubleshooting Procedures. In Accordance With (IAW) DC-10 SSM 73-00-0; disconnected # 1 Eng Flt/Grd [Ground] Idle Solenoid Cannon plug to isolate malfunctioned solenoid. When attempting to close Eng Grd/Flt Idle Control C/B; the C/B continued to pop. I then disconnected # 3 Engine Flt/Grd Idle Solenoid Cannon plug to isolate it. I then was able to successfully close the Eng Grd/Flt Idle Cont. C/B. IAW DC-10 MM 73-20-03-2; I secured # 1 Engine Flt/Grd Idle Solenoid Cannon plug and verified audible click of solenoid when energized. C/B remained closed. When attempting to verify # 3 Engine solenoid by re-securing Cannon plug; the 'Eng Grd/Flt Idle Cont C/B popped. At this time I determined # 3 Engine Grd/ Flt Idle Solenoid to be bad. I conferred findings with Maintenance Control Engine group and agreed to MEL # 3 Engine IAW MEL 73-21-01-01. I then complied with MEL MAINTENANCE PROCEDURES. At engine start; flight crew confirmed Engine # 3 started in Flight Idle and # 1 and # 2 engines started in normal GRD Idle. Multiple events occurred and there were many details that needed attention; in addition to several interested parties wanting answers at the same time. I complied with required maintenance procedures; but failed to include description/explanation in the aircraft logbook. Taking one step at a time would assure all pertinent information is included in the logbook despite the pressing Estimated Time of Departure (ETD).

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.