<< >> NASA ASRS Report 535732, January 2002

A B757 flight crew overshoots their assigned STAR altitude while distraction with company radio call and an amended clearance into las, nv.

Attributes
ACN	535732
Time
Date	200201
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : las.airport
State Reference	NV
Altitude	msl bound lower : 11600 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : l30.tracon
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	arrival star : lynsy
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	controller military : 10 controller non radar : 2 controller radar : 28 controller supervisory : 10 flight time last 90 days : 250 flight time total : 22000 flight time type : 2000
ASRS Report	535732
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : overrode automation flight crew : returned to assigned altitude
Supplementary
Problem Areas	ATC Human Performance Aircraft Airspace Structure Environmental Factor Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

This is an altitude deviation caused by a change in approach clearance at the last moment, while one pilot was busy contacting company and the other pilot trying to enter data into FMC while flying the airplane. On jan/wed/02, flying iah-las, in a B757 on initial descent into las, with the first officer flying, an attempt was made to contact las operations by the captain, but no contact was made due to terrain blocking reception. After completing the descent check, the captain reattempted to contact las operations. While he was talking to operations, approach control issued a change in the arrival at which time the first officer attempted to enter the data into the FMC while flying the airplane. The captain finished with operations and noticed the first officer going through the restr at lynsy of 12000 ft, 250 KTS. After a momentary deviation of 300-400 ft below 12000 ft, the first officer disconnected the autoplt and returned to 12000 ft.

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Original NASA ASRS Text

Title: A B757 FLC OVERSHOOTS THEIR ASSIGNED STAR ALT WHILE DISTR WITH COMPANY RADIO CALL AND AN AMENDED CLRNC INTO LAS, NV.

Narrative: THIS IS AN ALTDEV CAUSED BY A CHANGE IN APCH CLRNC AT THE LAST MOMENT, WHILE ONE PLT WAS BUSY CONTACTING COMPANY AND THE OTHER PLT TRYING TO ENTER DATA INTO FMC WHILE FLYING THE AIRPLANE. ON JAN/WED/02, FLYING IAH-LAS, IN A B757 ON INITIAL DSCNT INTO LAS, WITH THE FO FLYING, AN ATTEMPT WAS MADE TO CONTACT LAS OPS BY THE CAPT, BUT NO CONTACT WAS MADE DUE TO TERRAIN BLOCKING RECEPTION. AFTER COMPLETING THE DSCNT CHK, THE CAPT REATTEMPTED TO CONTACT LAS OPS. WHILE HE WAS TALKING TO OPS, APCH CTL ISSUED A CHANGE IN THE ARR AT WHICH TIME THE FO ATTEMPTED TO ENTER THE DATA INTO THE FMC WHILE FLYING THE AIRPLANE. THE CAPT FINISHED WITH OPS AND NOTICED THE FO GOING THROUGH THE RESTR AT LYNSY OF 12000 FT, 250 KTS. AFTER A MOMENTARY DEV OF 300-400 FT BELOW 12000 FT, THE FO DISCONNECTED THE AUTOPLT AND RETURNED TO 12000 FT.

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.