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

Attributes
ACN	187064
Time
Date	199107
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : rdu
State Reference	NC
Altitude	msl bound lower : 8000 msl bound upper : 8400
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : rdu
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 other
Route In Use	arrival star : star
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : private pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 150 flight time total : 9500 flight time type : 300
ASRS Report	187064
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 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
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 700
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On buzzy approach into rdu approximately 20 mi southwest at 8000 ft autoplt on, copilot flying. Approach issued traffic at 11 O'clock and about 3 mi at 7500 MSL heading towards us. As the airplane (target) closed TCASII target changed to yellow and issued warning 'traffic'. Then TCASII indicated target climbing to approximately 7700 ft and shortly thereafter began giving climb instructions as target became red. RA, we climbed about 400 ft to 8400 and traffic passed off left wing. Traffic was never seen by either crew member. Other plane was small aircraft and WX was high scattered and visibility was restr to 3 mi due to haze. After traffic cleared we descended back to 8000 ft.

Original NASA ASRS Text

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

Narrative: ON BUZZY APCH INTO RDU APPROX 20 MI SW AT 8000 FT AUTOPLT ON, COPLT FLYING. APCH ISSUED TFC AT 11 O'CLOCK AND ABOUT 3 MI AT 7500 MSL HDG TOWARDS US. AS THE AIRPLANE (TARGET) CLOSED TCASII TARGET CHANGED TO YELLOW AND ISSUED WARNING 'TFC'. THEN TCASII INDICATED TARGET CLBING TO APPROX 7700 FT AND SHORTLY THEREAFTER BEGAN GIVING CLB INSTRUCTIONS AS TARGET BECAME RED. RA, WE CLBED ABOUT 400 FT TO 8400 AND TFC PASSED OFF L WING. TFC WAS NEVER SEEN BY EITHER CREW MEMBER. OTHER PLANE WAS SMA AND WX WAS HIGH SCATTERED AND VISIBILITY WAS RESTR TO 3 MI DUE TO HAZE. AFTER TFC CLRED WE DSNDED BACK TO 8000 FT.

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.