<< >> NASA ASRS Report 280077, August 1994

Medium large transport shows up at wrong altitude when crossing a foreign assigned fix due to a lack of ATC coordination.

Attributes
ACN	280077
Time
Date	199408
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : mmex
State Reference	FO
Altitude	msl bound lower : 33000 msl bound upper : 37000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute airway : mmid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 220 flight time total : 9000 flight time type : 2000
ASRS Report	280077
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	non adherence other other anomaly other
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure Operational Deviation

Narrative:

Initial clearance from mexico city to orlando was climb to and maintain FL370. After airborne crew determined we were still too heavy for FL370 and a final cruise altitude of FL330 was assigned by mexico city center. We were handed off to merida center in a non-radar environment. When we position reported novek intersection at FL330 merida center believed our assigned from mexico city to be at FL370. Mexico center did not, apparently, give merida center an amended altitude of FL330. This caused merida center concern, given the possibility of potential traffic conflict. It was also reported to mexico city center, the crew reported level at FL330 under radar control to mexico city center.

Related reports:

• Poor coordination between high and low altitude sectors, and...
• Poor coordination between data and radar controllers, small ...
• Medium large transport bizjet crew was issued a low altitude...
• Incomplete coordination at sector in ARTCC and small transpo...
• A wrong altitude was coordination on a widebody transport wi...
• ARTCC controller climbed an medium large transport above his...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: MLG SHOWS UP AT WRONG ALT WHEN XING A FOREIGN ASSIGNED FIX DUE TO A LACK OF ATC COORD.

Narrative: INITIAL CLRNC FROM MEXICO CITY TO ORLANDO WAS CLB TO AND MAINTAIN FL370. AFTER AIRBORNE CREW DETERMINED WE WERE STILL TOO HVY FOR FL370 AND A FINAL CRUISE ALT OF FL330 WAS ASSIGNED BY MEXICO CITY CTR. WE WERE HANDED OFF TO MERIDA CTR IN A NON-RADAR ENVIRONMENT. WHEN WE POS RPTED NOVEK INTXN AT FL330 MERIDA CTR BELIEVED OUR ASSIGNED FROM MEXICO CITY TO BE AT FL370. MEXICO CTR DID NOT, APPARENTLY, GIVE MERIDA CTR AN AMENDED ALT OF FL330. THIS CAUSED MERIDA CTR CONCERN, GIVEN THE POSSIBILITY OF POTENTIAL TFC CONFLICT. IT WAS ALSO RPTED TO MEXICO CITY CTR, THE CREW RPTED LEVEL AT FL330 UNDER RADAR CTL TO MEXICO CITY CTR.

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.