Air carrier medium large transport altitude deviation excursion from clearance altitude in response ...

Attributes
ACN	191117
Time
Date	199110
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : clt
State Reference	NC
Altitude	msl bound lower : 2500 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : clt tower : mdw
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other descent : approach descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
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 : 8000
ASRS Report	191117
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	horizontal : 3000 vertical : 0
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Were given 4000. Intercept localizer and then cleared for ILS approach runway 36L. We were already on localizer waiting for GS to be intercepted when TCASII issued an RA without a TA with a descend command of 23-2500 FPM on vsi. We complied, told approach control and he confirmed there was traffic that passed 1/2 mi behind us. Approach never did issue a TA before the event. We climbed to reintercept the GS and proceeded to land with no incident.

Original NASA ASRS Text

Title: ACR MLG ALT DEV EXCURSION FROM CLRNC ALT IN RESPONSE TO TCASII RA.

Narrative: WERE GIVEN 4000. INTERCEPT LOC AND THEN CLRED FOR ILS APCH RWY 36L. WE WERE ALREADY ON LOC WAITING FOR GS TO BE INTERCEPTED WHEN TCASII ISSUED AN RA WITHOUT A TA WITH A DSND COMMAND OF 23-2500 FPM ON VSI. WE COMPLIED, TOLD APCH CTL AND HE CONFIRMED THERE WAS TFC THAT PASSED 1/2 MI BEHIND US. APCH NEVER DID ISSUE A TA BEFORE THE EVENT. WE CLBED TO REINTERCEPT THE GS AND PROCEEDED TO LAND WITH NO INCIDENT.

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.

Air carrier medium large transport altitude deviation excursion from clearance altitude in response to TCASII RA.