An air carrier flight crew flying B737 near ghm failed to meet the crossing restr as instructed by A...

Attributes
ACN	434950
Time
Date	199904
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : ghm.vortac
State Reference	TN
Altitude	msl single value : 20000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zme.artcc
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 115 flight time total : 20000 flight time type : 17000
ASRS Report	434950
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : crossing restriction not met non adherence : clearance non adherence : far
Independent Detector	other flight crewa
Resolutory Action	controller : issued advisory none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were given a crossing restr to descend and maintain 10000 ft, 55 mi southwest of ghm VOR. Our altitude had been approximately FL200. We typed in the restr on the FMC/CDU. The descent point had already passed and gave us distance to the next waypoint. We mistakenly interrupted our descent point and thus failed to meet the clearance. Problem discovered when center asked us when we were going to start down. Lesson learned: back up computer information with raw data.

Original NASA ASRS Text

Title: AN ACR FLC FLYING B737 NEAR GHM FAILED TO MEET THE XING RESTR AS INSTRUCTED BY ATC.

Narrative: WE WERE GIVEN A XING RESTR TO DSND AND MAINTAIN 10000 FT, 55 MI SW OF GHM VOR. OUR ALT HAD BEEN APPROX FL200. WE TYPED IN THE RESTR ON THE FMC/CDU. THE DSCNT POINT HAD ALREADY PASSED AND GAVE US DISTANCE TO THE NEXT WAYPOINT. WE MISTAKENLY INTERRUPTED OUR DSCNT POINT AND THUS FAILED TO MEET THE CLRNC. PROB DISCOVERED WHEN CTR ASKED US WHEN WE WERE GOING TO START DOWN. LESSON LEARNED: BACK UP COMPUTER INFO WITH RAW DATA.

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.

An air carrier flight crew flying B737 near ghm failed to meet the crossing restr as instructed by ATC.