Altitude deviation altitude excursion in flight crew response to TCASII RA.

Attributes
ACN	259697
Time
Date	199312
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : agu
State Reference	FO
Altitude	msl bound lower : 39000 msl bound upper : 39700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : hkg
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute airway : j11
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 125 flight time total : 20000 flight time type : 2000
ASRS Report	259697
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 non adherence : required legal separation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 13500 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Pilot Deviation
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

Intruder aircraft (light transport class) crossed left to right at same altitude causing TCASII RA. We followed TCASII command and climbed approximately 600-700 ft before 'clear of conflict.' no warning from mexico center (120.1) and no satisfactory explanation after we reported the RA. Intruder aircraft appeared to be northbound on J-5 over gabli intersection. I do not think that he saw our aircraft, nor was TCASII equipped.

Original NASA ASRS Text

Title: ALTDEV ALT EXCURSION IN FLC RESPONSE TO TCASII RA.

Narrative: INTRUDER ACFT (LTT CLASS) CROSSED L TO R AT SAME ALT CAUSING TCASII RA. WE FOLLOWED TCASII COMMAND AND CLBED APPROX 600-700 FT BEFORE 'CLR OF CONFLICT.' NO WARNING FROM MEXICO CTR (120.1) AND NO SATISFACTORY EXPLANATION AFTER WE RPTED THE RA. INTRUDER ACFT APPEARED TO BE NBOUND ON J-5 OVER GABLI INTXN. I DO NOT THINK THAT HE SAW OUR ACFT, NOR WAS TCASII EQUIPPED.

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.