First officer of air carrier medium large transport aircraft deviated from assigned altitude in resp...

Attributes
ACN	216012
Time
Date	199207
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : alb
State Reference	NY
Altitude	msl bound lower : 29000 msl bound upper : 29600
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob tower : gnv
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : instrument pilot : commercial
Experience	flight time last 90 days : 180 flight time total : 2700 flight time type : 1200
ASRS Report	216012
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While in level cruise at FL290 in IMC approximately 130 DME out on the 290 degree radial of alb, TCASII issued a TA for a wbound aircraft level at FL280 at 11-12 O'clock. At approximately 124 DME TCASII issued an RA for same aircraft target, requested a climb of approximately 1500 FPM. The RA was followed and aircraft was maneuvered up to 29600 ft when a 'clear of conflict' advisory was issued. ATC was advised and we were instructed to descend to FL290 and they confirmed that the wbound aircraft had remained at FL280. It was our belief that TCASII was faulty, therefore, it was turned off and deferred as inoperative by maintenance.

Original NASA ASRS Text

Title: FO OF ACR MLG ACFT DEVIATED FROM ASSIGNED ALT IN RESPONSE TO TCASII RA.

Narrative: WHILE IN LEVEL CRUISE AT FL290 IN IMC APPROX 130 DME OUT ON THE 290 DEG RADIAL OF ALB, TCASII ISSUED A TA FOR A WBOUND ACFT LEVEL AT FL280 AT 11-12 O'CLOCK. AT APPROX 124 DME TCASII ISSUED AN RA FOR SAME ACFT TARGET, REQUESTED A CLB OF APPROX 1500 FPM. THE RA WAS FOLLOWED AND ACFT WAS MANEUVERED UP TO 29600 FT WHEN A 'CLR OF CONFLICT' ADVISORY WAS ISSUED. ATC WAS ADVISED AND WE WERE INSTRUCTED TO DSND TO FL290 AND THEY CONFIRMED THAT THE WBOUND ACFT HAD REMAINED AT FL280. IT WAS OUR BELIEF THAT TCASII WAS FAULTY, THEREFORE, IT WAS TURNED OFF AND DEFERRED AS INOP BY MAINT.

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.

First officer of air carrier medium large transport aircraft deviated from assigned altitude in response to TCASII RA.