An air carrier B727 flight crew is informed by controllers in 2 different artccs that they were off course by approximately 30 NM. A later ground check showed that both ONS system were 31 NM off.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	344120
Time
Date	199608
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : pta
State Reference	FO
Environment
Light	Night
Aircraft 1
Controlling Facilities	artcc : mdcs artcc : zma
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute : atlantic enroute : other oceanic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	344120
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : unable other other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

From swimm direct to sekar had navigation error of up to 30 mi. ZMA cleared us to sdq, center said we still had 30 mi to go. Pta VOR was usable at 85 mi. To find position flew to pta and on deck found navigation position in both ONS to be 31 mi off.

Original NASA ASRS Text

Title: AN ACR B727 FLC IS INFORMED BY CTLRS IN 2 DIFFERENT ARTCCS THAT THEY WERE OFF COURSE BY APPROX 30 NM. A LATER GND CHK SHOWED THAT BOTH ONS SYS WERE 31 NM OFF.

Narrative: FROM SWIMM DIRECT TO SEKAR HAD NAV ERROR OF UP TO 30 MI. ZMA CLRED US TO SDQ, CTR SAID WE STILL HAD 30 MI TO GO. PTA VOR WAS USABLE AT 85 MI. TO FIND POS FLEW TO PTA AND ON DECK FOUND NAV POS IN BOTH ONS TO BE 31 MI OFF.

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.