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B727 crew turned away from high terrain after having conflicting DME readings and then DME drop out on both sides.
| Attributes | |
| ACN | 533226 |
| Time | |
| Date | 200112 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : abq.airport |
| State Reference | NM |
| Altitude | agl single value : 1000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : abq.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure : noise abatement |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 20 flight time total : 14000 flight time type : 6000 |
| ASRS Report | 533226 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : dme other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact other |
| Supplementary | |
| Problem Areas | Aircraft FAA |
| Primary Problem | Aircraft |
Narrative:
Prior to takeoff we briefed the noise abatement procedures for a runway 8 departure. We were cleared for a noise abatement procedure takeoff and a subsequent turn to the northwest. During clean-up, the first officer (PF) started a left turn since his DME read 15 NM, 13.5 DME was required, and delay of the turn would make a terrain conflict likely. My DME read 11.5 at the time, then both DME's failed in the turn. I believe we initiated the turn 2 mi early based on my DME and looking out the window. Better to risk being noisy than being too close to rapidly rising terrain further east.
Original NASA ASRS Text
Title: B727 CREW TURNED AWAY FROM HIGH TERRAIN AFTER HAVING CONFLICTING DME READINGS AND THEN DME DROP OUT ON BOTH SIDES.
Narrative: PRIOR TO TKOF WE BRIEFED THE NOISE ABATEMENT PROCS FOR A RWY 8 DEP. WE WERE CLRED FOR A NOISE ABATEMENT PROC TKOF AND A SUBSEQUENT TURN TO THE NW. DURING CLEAN-UP, THE FO (PF) STARTED A L TURN SINCE HIS DME READ 15 NM, 13.5 DME WAS REQUIRED, AND DELAY OF THE TURN WOULD MAKE A TERRAIN CONFLICT LIKELY. MY DME READ 11.5 AT THE TIME, THEN BOTH DME'S FAILED IN THE TURN. I BELIEVE WE INITIATED THE TURN 2 MI EARLY BASED ON MY DME AND LOOKING OUT THE WINDOW. BETTER TO RISK BEING NOISY THAN BEING TOO CLOSE TO RAPIDLY RISING TERRAIN FURTHER E.
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.