|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Locale Reference||airport : zzz.airport|
|Altitude||agl single value : 0|
|Operator||common carrier : air carrier|
|Make Model Name||MD-80 Series (DC-9-80) Undifferentiated or Other Model|
|Operating Under FAR Part||Part 121|
|Flight Phase||ground : maintenance|
|Affiliation||company : air carrier|
|Function||maintenance : technician|
|Qualification||technician : powerplant|
technician : airframe
|Anomaly||aircraft equipment problem : critical|
maintenance problem : improper documentation
maintenance problem : improper maintenance
non adherence : far
non adherence : published procedure
|Independent Detector||other flight crewa|
other flight crewb
|Resolutory Action||none taken : detected after the fact|
|Maintenance||contributing factor : manuals|
performance deficiency : logbook entry
performance deficiency : repair
performance deficiency : testing
performance deficiency : training
Chart Or Publication
Maintenance Human Performance
|Primary Problem||Flight Crew Human Performance|
On sep/fri/03, I was assigned to work on aircraft X. PIREP #X read 'ignition system 'a' operated to extended duty cycle of approximately 20 mins.' after reviewing the operations manual which states 'if continuous ignition system is inoperative and ignition is required in-flight, override system may be operated to extended duty cycle of 20 mins on, 10 mins off. An entry is required when this extended duty cycle is used.' and after reviewing the air carrier Y maintenance manual 74-00-00 which states a caution: 'if 20-4 joule exciter has been operated beyond recommended duty cycle, unit must be removed and checked per operating instructions.' I also reviewed the 'rgmn' for any placards on the aircraft. Since there was no placard on the continuous ignition system, I interpreted the PIREP as the crew operated the ignition system in the 4 joule continuous mode and stated as such in my signoff for PIREP #X. I quoted as follows: 'system 'a' ignition duty cycle was used in continuous 4 joule mode. 4 joule system may be operated continuously, information noted aircraft ok for service.' the aircraft departed to ZZZ. When I returned to work after my wkend, I found out that when the aircraft arrived in ZZZ a PIREP was added to the PIREP #Y, 'reference PIREP X has an improper action taken, this aircraft has no 4 joule system.' I started to do more research and found out that aircraft do indeed have a twin pack 20-20 exciter added by P&west sb 5880, the twin pack is a dual unit continuous duty exciter with no duty cycle limits. In summary, I was incorrect mentioning the 4 joule system in my initial signoff. I feel air carrier X should also offer an air carrier Y/air carrier X differences. The only training I have had is on air carrier X MD80 aircraft and the air carrier Y are a different confign.
Original NASA ASRS Text
Title: AN MD80 CONTINUOUS IGNITION SYS WAS SIGNED OFF INADVERTENTLY WITH DATA FROM A MERGED CARRIER MD80 MAINT MANUAL. ERROR IN DIFFERENT SYS.
Narrative: ON SEP/FRI/03, I WAS ASSIGNED TO WORK ON ACFT X. PIREP #X READ 'IGNITION SYS 'A' OPERATED TO EXTENDED DUTY CYCLE OF APPROX 20 MINS.' AFTER REVIEWING THE OPS MANUAL WHICH STATES 'IF CONTINUOUS IGNITION SYS IS INOP AND IGNITION IS REQUIRED INFLT, OVERRIDE SYS MAY BE OPERATED TO EXTENDED DUTY CYCLE OF 20 MINS ON, 10 MINS OFF. AN ENTRY IS REQUIRED WHEN THIS EXTENDED DUTY CYCLE IS USED.' AND AFTER REVIEWING THE ACR Y MAINT MANUAL 74-00-00 WHICH STATES A CAUTION: 'IF 20-4 JOULE EXCITER HAS BEEN OPERATED BEYOND RECOMMENDED DUTY CYCLE, UNIT MUST BE REMOVED AND CHKED PER OPERATING INSTRUCTIONS.' I ALSO REVIEWED THE 'RGMN' FOR ANY PLACARDS ON THE ACFT. SINCE THERE WAS NO PLACARD ON THE CONTINUOUS IGNITION SYS, I INTERPED THE PIREP AS THE CREW OPERATED THE IGNITION SYS IN THE 4 JOULE CONTINUOUS MODE AND STATED AS SUCH IN MY SIGNOFF FOR PIREP #X. I QUOTED AS FOLLOWS: 'SYS 'A' IGNITION DUTY CYCLE WAS USED IN CONTINUOUS 4 JOULE MODE. 4 JOULE SYS MAY BE OPERATED CONTINUOUSLY, INFO NOTED ACFT OK FOR SVC.' THE ACFT DEPARTED TO ZZZ. WHEN I RETURNED TO WORK AFTER MY WKEND, I FOUND OUT THAT WHEN THE ACFT ARRIVED IN ZZZ A PIREP WAS ADDED TO THE PIREP #Y, 'REF PIREP X HAS AN IMPROPER ACTION TAKEN, THIS ACFT HAS NO 4 JOULE SYS.' I STARTED TO DO MORE RESEARCH AND FOUND OUT THAT ACFT DO INDEED HAVE A TWIN PACK 20-20 EXCITER ADDED BY P&W SB 5880, THE TWIN PACK IS A DUAL UNIT CONTINUOUS DUTY EXCITER WITH NO DUTY CYCLE LIMITS. IN SUMMARY, I WAS INCORRECT MENTIONING THE 4 JOULE SYS IN MY INITIAL SIGNOFF. I FEEL ACR X SHOULD ALSO OFFER AN ACR Y/ACR X DIFFERENCES. THE ONLY TRAINING I HAVE HAD IS ON ACR X MD80 ACFT AND THE ACR Y ARE A DIFFERENT CONFIGN.
Data retrieved from NASA's ASRS site as of July 2007 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.