B777 crew gave the wrong time estimate for entry into oceanic airspace.

Attributes
ACN	458050
Time
Date	199912
Day	Thu
Local Time Of Day	1201 To 1800
Place
State Reference	FO
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : eggx.artcc
Operator	common carrier : air carrier
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other other
Flight Phase	cruise : level
Route In Use	enroute : atlantic
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 : 16000 flight time type : 2500
ASRS Report	458050
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	non adherence : far non adherence : company policies non adherence : published procedure other anomaly other
Independent Detector	other flight crewa other flight crewb other other : 3
Resolutory Action	none taken : anomaly accepted none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

At approximately AB15Z, I called shanwick oceanic for an oceanic clearance. I checked the FMC for an estimate for crossing 52 north 15 west. The FMC was estimating AC36Z. In the past, I have read the estimate directly off the FMC when requesting a clearance. This time my relief pilot had written on the track message the proper order of the information to give shanwick on call up for the clearance. Next to entry point he had written 52/15 EST.... I rechked the FMC which was still estimating AC36Z and then put down AD36Z, which is the estimate I then gave shanwick. I was not aware of the time error until passing 52 north 15 west at AC38Z and subsequently getting a call from shanwick informing me of the mistake. After receiving clearance, I recorded on the master flight plan the estimate of AC36Z that I thought I had given to shanwick. I think that deviating from my normal habit of reading estimates directly from the FMC contributed to the error. By writing the 15 west estimate on a separate piece of paper, I opened myself up to transcribing an incorrect number. No traffic conflict occurred because of the time estimate error.

Original NASA ASRS Text

Title: B777 CREW GAVE THE WRONG TIME ESTIMATE FOR ENTRY INTO OCEANIC AIRSPACE.

Narrative: AT APPROX AB15Z, I CALLED SHANWICK OCEANIC FOR AN OCEANIC CLRNC. I CHKED THE FMC FOR AN ESTIMATE FOR XING 52 N 15 W. THE FMC WAS ESTIMATING AC36Z. IN THE PAST, I HAVE READ THE ESTIMATE DIRECTLY OFF THE FMC WHEN REQUESTING A CLRNC. THIS TIME MY RELIEF PLT HAD WRITTEN ON THE TRACK MESSAGE THE PROPER ORDER OF THE INFO TO GIVE SHANWICK ON CALL UP FOR THE CLRNC. NEXT TO ENTRY POINT HE HAD WRITTEN 52/15 EST.... I RECHKED THE FMC WHICH WAS STILL ESTIMATING AC36Z AND THEN PUT DOWN AD36Z, WHICH IS THE ESTIMATE I THEN GAVE SHANWICK. I WAS NOT AWARE OF THE TIME ERROR UNTIL PASSING 52 N 15 W AT AC38Z AND SUBSEQUENTLY GETTING A CALL FROM SHANWICK INFORMING ME OF THE MISTAKE. AFTER RECEIVING CLRNC, I RECORDED ON THE MASTER FLT PLAN THE ESTIMATE OF AC36Z THAT I THOUGHT I HAD GIVEN TO SHANWICK. I THINK THAT DEVIATING FROM MY NORMAL HABIT OF READING ESTIMATES DIRECTLY FROM THE FMC CONTRIBUTED TO THE ERROR. BY WRITING THE 15 W ESTIMATE ON A SEPARATE PIECE OF PAPER, I OPENED MYSELF UP TO TRANSCRIBING AN INCORRECT NUMBER. NO TFC CONFLICT OCCURRED BECAUSE OF THE TIME ESTIMATE ERROR.

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.