Diversion to another airport when the flight crew of a climbing B752 note a degradation of their climb and attempted cruise performance at FL300, east of and landing at hnl, hi.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	617130
Time
Date	200405
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ogg.airport
State Reference	HI
Altitude	msl bound lower : 25000 msl bound upper : 30000
Environment
Weather Elements	Thunderstorm
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zhn.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude climbout : vacating altitude
Route In Use	enroute : pacific
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 26000 flight time type : 3000
ASRS Report	617130
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 182 flight time total : 12500 flight time type : 1979
ASRS Report	617126
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure other anomaly
Independent Detector	aircraft equipment other aircraft equipment : alpha warning other flight crewa other flight crewb
Resolutory Action	flight crew : landed as precaution flight crew : diverted to another airport other
Consequence	other other
Supplementary
Problem Areas	Maintenance Human Performance Company Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

Took off runway 20 flaps 15 degrees, gross weight 220000 pounds from maui. On climb out, we noticed at around FL250, the airplane did not appear to be accelerating for the amount of thrust I set. At FL300, it was more obvious the aircraft was not performing as evidenced by a gradual degradation of climb performance as determined by the power, rate of climb, and airspeed. Finally, with firewalled thrust and disconnected autothrottle, the airspeed stabilized at approximately 220 KTS, and we got the flashing 'slow' alpha indication. We made the decision, with no EICAS annunciations, to turn around and get the aircraft on the ground in hnl. Callback conversation with reporter revealed the following information: the reporter apologized for the fact that he could not discuss the situation as related to any findings postflt, as the company had placed a confidential category upon this information during a conference call.

Original NASA ASRS Text

Title: DIVERSION TO ANOTHER ARPT WHEN THE FLT CREW OF A CLBING B752 NOTE A DEGRADATION OF THEIR CLB AND ATTEMPTED CRUISE PERFORMANCE AT FL300, E OF AND LNDG AT HNL, HI.

Narrative: TOOK OFF RWY 20 FLAPS 15 DEGS, GROSS WT 220000 LBS FROM MAUI. ON CLBOUT, WE NOTICED AT AROUND FL250, THE AIRPLANE DID NOT APPEAR TO BE ACCELERATING FOR THE AMOUNT OF THRUST I SET. AT FL300, IT WAS MORE OBVIOUS THE ACFT WAS NOT PERFORMING AS EVIDENCED BY A GRADUAL DEGRADATION OF CLB PERFORMANCE AS DETERMINED BY THE PWR, RATE OF CLB, AND AIRSPD. FINALLY, WITH FIREWALLED THRUST AND DISCONNECTED AUTOTHROTTLE, THE AIRSPD STABILIZED AT APPROX 220 KTS, AND WE GOT THE FLASHING 'SLOW' ALPHA INDICATION. WE MADE THE DECISION, WITH NO EICAS ANNUNCIATIONS, TO TURN AROUND AND GET THE ACFT ON THE GND IN HNL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR APOLOGIZED FOR THE FACT THAT HE COULD NOT DISCUSS THE SIT AS RELATED TO ANY FINDINGS POSTFLT, AS THE COMPANY HAD PLACED A CONFIDENTIAL CATEGORY UPON THIS INFO DURING A CONFERENCE CALL.

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.