An experienced B747 flight crew had difficulties understanding vhhh clearance delivery and flew the wrong departure. A departure that could have conflicted with a departure from the parallel runway.

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Attributes
ACN	433173
Time
Date	199903
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : smt.vor
State Reference	FO
Altitude	msl single value : 2000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : vhhh.tracon
Operator	common carrier : air carrier
Make Model Name	B747-C/F
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	climbout : initial
Route In Use	departure sid : roach !+
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 13000 flight time type : 180
ASRS Report	433173
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : published procedure
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued alert controller : issued new clearance
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Clearance was requested by captain. All 3 crew members were listening. Clearance from hkg controller sounded like roach 1 departure SID, but there is also a perch 1 SID. None of us could understand him. The captain had him confirm the roach 1 SID. Again, the controller sounded like roach 1. We concurred. The captain read back the clearance as roach 1. We departed runway 7R. You guessed it. Departure control wanted to know why we were deviating left of course. His clearance was for the perch 1 departure. Thankfully there was no departing traffic off runway 7L. This crew flies to most countries in the world, so is used to ATC dialect problems. Whoever allowed the design of this departure with waypoints so similar to slip through, should have to be the only one to sift through the wreckage of the aftermath. Get one of the names changed!

Original NASA ASRS Text

Title: AN EXPERIENCED B747 FLC HAD DIFFICULTIES UNDERSTANDING VHHH CLRNC DELIVERY AND FLEW THE WRONG DEP. A DEP THAT COULD HAVE CONFLICTED WITH A DEP FROM THE PARALLEL RWY.

Narrative: CLRNC WAS REQUESTED BY CAPT. ALL 3 CREW MEMBERS WERE LISTENING. CLRNC FROM HKG CTLR SOUNDED LIKE ROACH 1 DEP SID, BUT THERE IS ALSO A PERCH 1 SID. NONE OF US COULD UNDERSTAND HIM. THE CAPT HAD HIM CONFIRM THE ROACH 1 SID. AGAIN, THE CTLR SOUNDED LIKE ROACH 1. WE CONCURRED. THE CAPT READ BACK THE CLRNC AS ROACH 1. WE DEPARTED RWY 7R. YOU GUESSED IT. DEP CTL WANTED TO KNOW WHY WE WERE DEVIATING L OF COURSE. HIS CLRNC WAS FOR THE PERCH 1 DEP. THANKFULLY THERE WAS NO DEPARTING TFC OFF RWY 7L. THIS CREW FLIES TO MOST COUNTRIES IN THE WORLD, SO IS USED TO ATC DIALECT PROBS. WHOEVER ALLOWED THE DESIGN OF THIS DEP WITH WAYPOINTS SO SIMILAR TO SLIP THROUGH, SHOULD HAVE TO BE THE ONLY ONE TO SIFT THROUGH THE WRECKAGE OF THE AFTERMATH. GET ONE OF THE NAMES CHANGED!

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.