<< >> NASA ASRS Report 313520, August 1995

Altitude deviation altitude overshot -- air carrier overshoots its assigned altitude and gets an RA because of a rapid climb and the overshoot.

Attributes
ACN	313520
Time
Date	199508
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iah
State Reference	TX
Altitude	msl bound lower : 5000 msl bound upper : 5200
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iah
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 14000 flight time type : 2000
ASRS Report	313520
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : far non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 1000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We got RA on initial climb to 5000 ft climbing north out of houston. Traffic was on arrival to iah at 6000 ft. My aircraft was very light and climbed rapidly. I was hand-flying the aircraft following the flight director. We were issued a TA from departure control and observed it on TCASII. We did not see it because we were in a scattered cloud layer. RA probably came on due to the rapid climb. I had started to level off. Due to the rapid climb the flight director took the aircraft 200 ft above our set altitude. The TCASII commanded a descent. The RA must have come on due to the rapid climb. Next time in similar circumstances I will disconnect the autothrottle and reduce the power to prevent the rapid climb.

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Original NASA ASRS Text

Title: ALTDEV ALT OVERSHOT -- ACR OVERSHOOTS ITS ASSIGNED ALT AND GETS AN RA BECAUSE OF A RAPID CLB AND THE OVERSHOOT.

Narrative: WE GOT RA ON INITIAL CLB TO 5000 FT CLBING N OUT OF HOUSTON. TFC WAS ON ARR TO IAH AT 6000 FT. MY ACFT WAS VERY LIGHT AND CLBED RAPIDLY. I WAS HAND-FLYING THE ACFT FOLLOWING THE FLT DIRECTOR. WE WERE ISSUED A TA FROM DEP CTL AND OBSERVED IT ON TCASII. WE DID NOT SEE IT BECAUSE WE WERE IN A SCATTERED CLOUD LAYER. RA PROBABLY CAME ON DUE TO THE RAPID CLB. I HAD STARTED TO LEVEL OFF. DUE TO THE RAPID CLB THE FLT DIRECTOR TOOK THE ACFT 200 FT ABOVE OUR SET ALT. THE TCASII COMMANDED A DSCNT. THE RA MUST HAVE COME ON DUE TO THE RAPID CLB. NEXT TIME IN SIMILAR CIRCUMSTANCES I WILL DISCONNECT THE AUTOTHROTTLE AND REDUCE THE PWR TO PREVENT THE RAPID CLB.

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.