Flight crew of an medium large transport air carrier aircraft descended off of assigned altitude in response to a TCASII RA.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	248497
Time
Date	199308
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : tlh
State Reference	FL
Altitude	msl bound lower : 1500 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : tlh
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach descent other
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 8500 flight time type : 715
ASRS Report	248497
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 1 vertical : 900
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Approaching tlh airport, VFR conditions. Vectored by tower due to VFR traffic 11 O'clock, 3 mi. We had no visual contact. TCASII showed traffic, then issued a descend RA. I initiated descent from 2000 ft. At 1500 ft, TCASII issued clear of traffic conflict. At this point we acquired the aircraft visually. Notified ATC of altitude deviation due to TCASII RA. It would have been a close encounter if we had not descended.

Original NASA ASRS Text

Title: FLC OF AN MLG ACR ACFT DSNDED OFF OF ASSIGNED ALT IN RESPONSE TO A TCASII RA.

Narrative: APCHING TLH ARPT, VFR CONDITIONS. VECTORED BY TWR DUE TO VFR TFC 11 O'CLOCK, 3 MI. WE HAD NO VISUAL CONTACT. TCASII SHOWED TFC, THEN ISSUED A DSND RA. I INITIATED DSCNT FROM 2000 FT. AT 1500 FT, TCASII ISSUED CLR OF TFC CONFLICT. AT THIS POINT WE ACQUIRED THE ACFT VISUALLY. NOTIFIED ATC OF ALTDEV DUE TO TCASII RA. IT WOULD HAVE BEEN A CLOSE ENCOUNTER IF WE HAD NOT DSNDED.

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.