Narrative:

The choshi 8 departure, runway 16, has had its problems because it is a departure that uses ADF's. We had 27 KTS of crosswind after liftoff, moderate turbulence, and rain on this departure. The SID does not specify 'track' 156 degrees but instead says climb on 156 degrees, which causes confusion. We may have drifted right of course due to the strong crosswind but were never told that we had violated the corridor. Consequently this NASA report is being submitted as a precaution. The sids out of new tokyo (rjaa) airport need to be revised to use modern navaids that are currently on the field. Using ADF's for departure sids will continue to cause problems, especially when strong xwinds exist. Callback conversation with reporter revealed the following information: the crew flying a DC10 freighter. There is a 4 degree tolerance allowed on their compasses for takeoff which would create a problem of accuracy in their tracking technique using the RMI for bearing information. Their RMI is very small and hard to read, particularly during a rainy, wind swept day with turbulence and xwinds. It's 'a lot of work.' the captain is used to these type navigation procedures but this one is 'too much.' the corridor they must adhere to is only 1.5 mi wide, presumably for noise abatement procedures from runway 34 and runway 16. The amount of drift varies due to the tree line west of the runways. This airport experiences strong xwinds. Once airborne, the windshear effect is pronounced, with a quick drift being experienced. The reporter stated that there were 21 flts that were off course this day, the departure controller was 'overwhelmed' with the load and did not try to correct the situation, could not. The FMS equipped aircraft were among those experiencing off course tracks. The captain explained that 10 yrs ago the procedure was to fly the VOR 157 degree or the 337 degree radial and that appeared to work. The corridor was realigned, using the beacons 'kf' and 'yq' which does not work. Attempting to use the nre VOR 336 degree and 156 degree radials doesn't work either since the VOR is off center from the runways. The captain has tried using the INS to fly the track, using the coordinates of the beacon as waypoint #1, using the course displacement indicator as a guide to stay in the corridor. His company has tried this out in the simulator. The company has sent a letter to ATC in the region regarding this problem but the captain would appreciate any additional efforts made by any other agencies.

Related reports:

Google
 

Original NASA ASRS Text

Title: CB AN ACR FREIGHTER DRIFTS SLIGHTLY OFF COURSE ON THE CHOSHI 8 SID DEP PROC WHEN THE CAPT DOES NOT FLY A TRACK BUT A HDG AFTER TKOF FROM NRT, FO.

Narrative: THE CHOSHI 8 DEP, RWY 16, HAS HAD ITS PROBS BECAUSE IT IS A DEP THAT USES ADF'S. WE HAD 27 KTS OF XWIND AFTER LIFTOFF, MODERATE TURB, AND RAIN ON THIS DEP. THE SID DOES NOT SPECIFY 'TRACK' 156 DEGS BUT INSTEAD SAYS CLB ON 156 DEGS, WHICH CAUSES CONFUSION. WE MAY HAVE DRIFTED R OF COURSE DUE TO THE STRONG XWIND BUT WERE NEVER TOLD THAT WE HAD VIOLATED THE CORRIDOR. CONSEQUENTLY THIS NASA RPT IS BEING SUBMITTED AS A PRECAUTION. THE SIDS OUT OF NEW TOKYO (RJAA) ARPT NEED TO BE REVISED TO USE MODERN NAVAIDS THAT ARE CURRENTLY ON THE FIELD. USING ADF'S FOR DEP SIDS WILL CONTINUE TO CAUSE PROBS, ESPECIALLY WHEN STRONG XWINDS EXIST. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE CREW FLYING A DC10 FREIGHTER. THERE IS A 4 DEG TOLERANCE ALLOWED ON THEIR COMPASSES FOR TKOF WHICH WOULD CREATE A PROB OF ACCURACY IN THEIR TRACKING TECHNIQUE USING THE RMI FOR BEARING INFO. THEIR RMI IS VERY SMALL AND HARD TO READ, PARTICULARLY DURING A RAINY, WIND SWEPT DAY WITH TURB AND XWINDS. IT'S 'A LOT OF WORK.' THE CAPT IS USED TO THESE TYPE NAV PROCS BUT THIS ONE IS 'TOO MUCH.' THE CORRIDOR THEY MUST ADHERE TO IS ONLY 1.5 MI WIDE, PRESUMABLY FOR NOISE ABATEMENT PROCS FROM RWY 34 AND RWY 16. THE AMOUNT OF DRIFT VARIES DUE TO THE TREE LINE W OF THE RWYS. THIS ARPT EXPERIENCES STRONG XWINDS. ONCE AIRBORNE, THE WINDSHEAR EFFECT IS PRONOUNCED, WITH A QUICK DRIFT BEING EXPERIENCED. THE RPTR STATED THAT THERE WERE 21 FLTS THAT WERE OFF COURSE THIS DAY, THE DEP CTLR WAS 'OVERWHELMED' WITH THE LOAD AND DID NOT TRY TO CORRECT THE SIT, COULD NOT. THE FMS EQUIPPED ACFT WERE AMONG THOSE EXPERIENCING OFF COURSE TRACKS. THE CAPT EXPLAINED THAT 10 YRS AGO THE PROC WAS TO FLY THE VOR 157 DEG OR THE 337 DEG RADIAL AND THAT APPEARED TO WORK. THE CORRIDOR WAS REALIGNED, USING THE BEACONS 'KF' AND 'YQ' WHICH DOES NOT WORK. ATTEMPTING TO USE THE NRE VOR 336 DEG AND 156 DEG RADIALS DOESN'T WORK EITHER SINCE THE VOR IS OFF CTR FROM THE RWYS. THE CAPT HAS TRIED USING THE INS TO FLY THE TRACK, USING THE COORDINATES OF THE BEACON AS WAYPOINT #1, USING THE COURSE DISPLACEMENT INDICATOR AS A GUIDE TO STAY IN THE CORRIDOR. HIS COMPANY HAS TRIED THIS OUT IN THE SIMULATOR. THE COMPANY HAS SENT A LETTER TO ATC IN THE REGION REGARDING THIS PROB BUT THE CAPT WOULD APPRECIATE ANY ADDITIONAL EFFORTS MADE BY ANY OTHER AGENCIES.

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.