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An MD80 MEL deferred item required a reserve thrust takeoff. Neither flight manual nor MEL stated how to comply with setting reserve thrust.
| Attributes | |
| ACN | 592985 |
| Time | |
| Date | 200309 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : preflight ground : parked ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 592985 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 5930856 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Chart Or Publication Aircraft |
| Primary Problem | Chart Or Publication |
Narrative:
Aircraft had 5 MEL placards. 2 influenced takeoff power settings. MEL 27-04-C ground spoiler inoperative called for maximum power takeoff. MEL 73-08 art system inoperative called for a reserve thrust takeoff when maximum was required. My first reserve thrust takeoff. Went to the operating manual to ensure I did it right. No procedures for reserve thrust takeoff in the operating manual volume 1 or 2 or the quick reference guide. Neither dispatch nor maintenance could give guidance. MEL item 73-07 mentions how to set reserve thrust. It says to set 64% N1 and shift power of DFGS. We did this on the runway prior to releasing brakes for the takeoff roll. To set reserve once 64% N1 was set we had to cycle the art switch from off to automatic. The art light illuminated indicating reserve thrust was computed and the EPR gauges went up accordingly. Although the art switch was moved out of the placarded off position, the automatic art system was not used per the intent of the MEL. There are no procedures clearly stating how to comply with setting reserve thrust in the MEL or the operating manual. This needs to be addressed and corrected.
Original NASA ASRS Text
Title: AN MD80 MEL DEFERRED ITEM REQUIRED A RESERVE THRUST TKOF. NEITHER FLT MANUAL NOR MEL STATED HOW TO COMPLY WITH SETTING RESERVE THRUST.
Narrative: ACFT HAD 5 MEL PLACARDS. 2 INFLUENCED TKOF PWR SETTINGS. MEL 27-04-C GND SPOILER INOP CALLED FOR MAX PWR TKOF. MEL 73-08 ART SYS INOP CALLED FOR A RESERVE THRUST TKOF WHEN MAX WAS REQUIRED. MY FIRST RESERVE THRUST TKOF. WENT TO THE OPERATING MANUAL TO ENSURE I DID IT RIGHT. NO PROCS FOR RESERVE THRUST TKOF IN THE OPERATING MANUAL VOLUME 1 OR 2 OR THE QUICK REF GUIDE. NEITHER DISPATCH NOR MAINT COULD GIVE GUIDANCE. MEL ITEM 73-07 MENTIONS HOW TO SET RESERVE THRUST. IT SAYS TO SET 64% N1 AND SHIFT PWR OF DFGS. WE DID THIS ON THE RWY PRIOR TO RELEASING BRAKES FOR THE TKOF ROLL. TO SET RESERVE ONCE 64% N1 WAS SET WE HAD TO CYCLE THE ART SWITCH FROM OFF TO AUTO. THE ART LIGHT ILLUMINATED INDICATING RESERVE THRUST WAS COMPUTED AND THE EPR GAUGES WENT UP ACCORDINGLY. ALTHOUGH THE ART SWITCH WAS MOVED OUT OF THE PLACARDED OFF POS, THE AUTOMATIC ART SYS WAS NOT USED PER THE INTENT OF THE MEL. THERE ARE NO PROCS CLRLY STATING HOW TO COMPLY WITH SETTING RESERVE THRUST IN THE MEL OR THE OPERATING MANUAL. THIS NEEDS TO BE ADDRESSED AND CORRECTED.
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.