<< >> NASA ASRS Report 268606, April 1994

Altitude bust.

Attributes
ACN	268606
Time
Date	199404
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : hnl
State Reference	HI
Altitude	msl bound lower : 34800 msl bound upper : 35600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zhn
Operator	common carrier : air carrier
Make Model Name	B747-100
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : other oceanic 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 : 131 flight time total : 9259 flight time type : 1183
ASRS Report	268606
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 11500 flight time type : 200
ASRS Report	268613
Events
Anomaly	aircraft equipment problem : critical altitude deviation : overshoot non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course none taken : insufficient time
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

During climb to FL350 with pms vertical navigation controling the aircraft, the nose pitched up and a climb of 5000 to 6000 FPM (or more) was commanded. Because we were approaching level off altitude, it was difficult to level (or prevent overshoot) at FL350 and the smooth descent was begun at approximately 35600 ft. No altitude overshoot indicated by ATC. Return to altitude was accomplished with autoplt off. Supplemental information from acn 268613: we were on autoplt B with pms engaged. Write up of autoplt/pms made in aircraft logbook. Proper altitude was set in pms which made no effort to capture.

Related reports:

• DC9 crew undershot an altitude crossing restr.
• A C172 instructor and student descended prematurely at kism,...
• Cpr small transport altitude deviation excursion from cleara...
• An air carrier flight crew responded to a vector clearance w...
• MD80 had altitude excursion.
• While level at intermediate altitude crew received a climb R...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: ALT BUST.

Narrative: DURING CLB TO FL350 WITH PMS VERT NAV CTLING THE ACFT, THE NOSE PITCHED UP AND A CLB OF 5000 TO 6000 FPM (OR MORE) WAS COMMANDED. BECAUSE WE WERE APCHING LEVEL OFF ALT, IT WAS DIFFICULT TO LEVEL (OR PREVENT OVERSHOOT) AT FL350 AND THE SMOOTH DSCNT WAS BEGUN AT APPROX 35600 FT. NO ALT OVERSHOOT INDICATED BY ATC. RETURN TO ALT WAS ACCOMPLISHED WITH AUTOPLT OFF. SUPPLEMENTAL INFO FROM ACN 268613: WE WERE ON AUTOPLT B WITH PMS ENGAGED. WRITE UP OF AUTOPLT/PMS MADE IN ACFT LOGBOOK. PROPER ALT WAS SET IN PMS WHICH MADE NO EFFORT TO CAPTURE.

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.