Flight crew of an large transport descended from assigned altitude in response to a TCASII RA.

Attributes
ACN	302187
Time
Date	199504
Day	Sun
Place
Locale Reference	atc facility : gcm
State Reference	FO
Altitude	msl bound lower : 31000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : mkjk
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other cruise other
Route In Use	enroute airway : mkjk
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	other : other
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
ASRS Report	302187
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	horizontal : 9000 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During flight at 33000 ft over grand cayman our TCASII system indicated traffic at 3 O'clock. We had a visual on the traffic and he was coming right at us. TCASII commanded a descent and we descended about 1500-2000 ft. The aircraft was air carrier Y flight, a 727, a 727 coming from mexico(?). Kingston was informed and questioned the air carrier Y flight about his reporting over the first kingston control point. He came within about 1 1/2 mi of our aircraft at the same altitude.

Original NASA ASRS Text

Title: FLC OF AN LGT DSNDED FROM ASSIGNED ALT IN RESPONSE TO A TCASII RA.

Narrative: DURING FLT AT 33000 FT OVER GRAND CAYMAN OUR TCASII SYS INDICATED TFC AT 3 O'CLOCK. WE HAD A VISUAL ON THE TFC AND HE WAS COMING RIGHT AT US. TCASII COMMANDED A DSCNT AND WE DSNDED ABOUT 1500-2000 FT. THE ACFT WAS ACR Y FLT, A 727, A 727 COMING FROM MEXICO(?). KINGSTON WAS INFORMED AND QUESTIONED THE ACR Y FLT ABOUT HIS RPTING OVER THE FIRST KINGSTON CTL POINT. HE CAME WITHIN ABOUT 1 1/2 MI OF OUR ACFT AT THE SAME ALT.

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.