A B737-500 flight crew delays their climb to assigned altitude when they fail to monitor the performance of their FMC FMS which had not engaged for the programmed climb 80 mi northwest of rbl, ca.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	481390
Time
Date	200008
Day	Tue
Local Time Of Day	0601 To 1200
Place
State Reference	CA
Altitude	msl bound lower : 23000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zse.artcc
Operator	common carrier : air carrier
Make Model Name	B737-500
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	enroute airway : ns.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument pilot : atp
Experience	flight time last 90 days : 150 flight time total : 4000 flight time type : 1000
ASRS Report	481390
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : undershoot non adherence : clearance non adherence : company policies other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued advisory flight crew : returned to original clearance flight crew : overcame equipment problem flight crew : became reoriented
Consequence	Other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Level at FL230, center issued a climb to FL330. PNF set new altitude, PF confirmed verbally and selected appropriate autoflt mode for climb. However, it did not engage. Aircraft remained in level flight for an undetermined length of time until ZSE reclred aircraft to FL330. Climb was initiated and no traffic separation was lost. Contributing factors: autoplt complacency, failure to confirm aircraft's response to autoflt mode selection.

Original NASA ASRS Text

Title: A B737-500 FLC DELAYS THEIR CLB TO ASSIGNED ALT WHEN THEY FAIL TO MONITOR THE PERFORMANCE OF THEIR FMC FMS WHICH HAD NOT ENGAGED FOR THE PROGRAMMED CLB 80 MI NW OF RBL, CA.

Narrative: LEVEL AT FL230, CTR ISSUED A CLB TO FL330. PNF SET NEW ALT, PF CONFIRMED VERBALLY AND SELECTED APPROPRIATE AUTOFLT MODE FOR CLB. HOWEVER, IT DID NOT ENGAGE. ACFT REMAINED IN LEVEL FLT FOR AN UNDETERMINED LENGTH OF TIME UNTIL ZSE RECLRED ACFT TO FL330. CLB WAS INITIATED AND NO TFC SEPARATION WAS LOST. CONTRIBUTING FACTORS: AUTOPLT COMPLACENCY, FAILURE TO CONFIRM ACFT'S RESPONSE TO AUTOFLT MODE SELECTION.

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.