<< >> NASA ASRS Report 448449, September 1999

Flight crew of a B737 undershot crossing fix due to a late start in descending after given clearance by ATC.

Attributes
ACN	448449
Time
Date	199909
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : czq.vortac
State Reference	CA
Altitude	msl bound lower : 24000 msl bound upper : 25000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa.artcc
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	descent : vacating altitude
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 : 200 flight time total : 17000 flight time type : 15000
ASRS Report	448449
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 8800 flight time type : 3000
ASRS Report	448430
Events
Anomaly	altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : clearance
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : insufficient time none taken : anomaly accepted
Consequence	Other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared to cross turlo intersection at FL240. Started down late and realized we might be high. We advised ATC and requested clearance to cross high. ATC advised there was traffic over turlo at FL290. We crossed turlo descending through FL250. No apparent conflict, but we were nevertheless high.

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Original NASA ASRS Text

Title: FLC OF A B737 UNDERSHOT XING FIX DUE TO A LATE START IN DSNDING AFTER GIVEN CLRNC BY ATC.

Narrative: CLRED TO CROSS TURLO INTXN AT FL240. STARTED DOWN LATE AND REALIZED WE MIGHT BE HIGH. WE ADVISED ATC AND REQUESTED CLRNC TO CROSS HIGH. ATC ADVISED THERE WAS TFC OVER TURLO AT FL290. WE CROSSED TURLO DSNDING THROUGH FL250. NO APPARENT CONFLICT, BUT WE WERE NEVERTHELESS HIGH.

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.