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|
Attributes | |
ACN | 675276 |
Time | |
Date | 200510 |
Local Time Of Day | 0601 To 1200 |
Place | |
Locale Reference | airport : zzz.airport |
State Reference | US |
Altitude | agl single value : 0 |
Aircraft 1 | |
Operator | common carrier : air carrier |
Make Model Name | B737-800 |
Operating Under FAR Part | Part 121 |
Flight Phase | ground : maintenance |
Flight Plan | IFR |
Person 1 | |
Affiliation | company : air carrier |
Function | other personnel other oversight : coordinator |
Qualification | technician : airframe technician : powerplant |
Experience | maintenance technician : 22 |
ASRS Report | 675276 |
Person 2 | |
Affiliation | company : air carrier |
Function | maintenance : technician |
Qualification | technician : powerplant technician : airframe |
Experience | maintenance technician : 22 |
ASRS Report | 674731 |
Events | |
Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
Independent Detector | aircraft equipment other aircraft equipment : #2 eng egt other flight crewa other flight crewb |
Resolutory Action | other |
Consequence | other |
Supplementary | |
Problem Areas | Chart Or Publication Maintenance Human Performance Aircraft |
Primary Problem | Maintenance Human Performance |
Narrative:
Call from XXX maintenance XA22 -- aircraft X flight abcd for #2 engine high start egt (716 degrees); maximum N1 at 1.0%. Exceedance page showed egt 737 degrees for 2.4 seconds (amm 71-00-00-800-804-foo figure 601 sheet 1 in area 'a'). Per amm 71-00-00-800-804-foo item E3 -- engine visual inspection performed (inlet and exhaust inspected with no damage and fan rotates freely); performed engine start with no abnormalities. Per amm 71-00-00-800-804-foo item E3C engine placed on one deferred item. Call from XXX maintenance XC37 -- air return for #2 engine problem. Call from XXX maintenance XD02 -- #2 engine change for turbine exceedance. Aircraft experienced an in-flight engine shutdown of the #2 engine on first flight after above noted hot start. Log page indicated N1 indication showed zero at one point during start. Amm requires borescope inspection if N1 reads zero -- borescope inspection was deferred due to additional step in amm that allows 1 cycle if subsequent start is successful. Event remains under investigation.
Original NASA ASRS Text
Title: A B737-800 WAS DISPATCHED AFTER A #2 ENG HOT START TEMP EXCEEDANCE CHK PER MAINT MANUAL SHEET 1 IN AREA 'A.' ENG CHKED OK. ENG SHUTDOWN INFLT. RETURNED TO DEP ARPT.
Narrative: CALL FROM XXX MAINT XA22 -- ACFT X FLT ABCD FOR #2 ENG HIGH START EGT (716 DEGS); MAX N1 AT 1.0%. EXCEEDANCE PAGE SHOWED EGT 737 DEGS FOR 2.4 SECONDS (AMM 71-00-00-800-804-FOO FIGURE 601 SHEET 1 IN AREA 'A'). PER AMM 71-00-00-800-804-FOO ITEM E3 -- ENG VISUAL INSPECTION PERFORMED (INLET AND EXHAUST INSPECTED WITH NO DAMAGE AND FAN ROTATES FREELY); PERFORMED ENG START WITH NO ABNORMALITIES. PER AMM 71-00-00-800-804-FOO ITEM E3C ENG PLACED ON ONE DEFERRED ITEM. CALL FROM XXX MAINT XC37 -- AIR RETURN FOR #2 ENG PROB. CALL FROM XXX MAINT XD02 -- #2 ENG CHANGE FOR TURBINE EXCEEDANCE. ACFT EXPERIENCED AN INFLT ENG SHUTDOWN OF THE #2 ENG ON FIRST FLT AFTER ABOVE NOTED HOT START. LOG PAGE INDICATED N1 INDICATION SHOWED ZERO AT ONE POINT DURING START. AMM REQUIRES BORESCOPE INSPECTION IF N1 READS ZERO -- BORESCOPE INSPECTION WAS DEFERRED DUE TO ADDITIONAL STEP IN AMM THAT ALLOWS 1 CYCLE IF SUBSEQUENT START IS SUCCESSFUL. EVENT REMAINS UNDER INVESTIGATION.
Data retrieved from NASA's ASRS site as of January 2009 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.