|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601-1200|
|Make Model Name||Large Transport|
2 Turbojet Eng
|Operating Under FAR Part||Part 121|
Pilot Not Flying
|Experience||Flight Crew Last 90 Days 153|
Flight Crew Total 10049
Flight Crew Type 5022
|Experience||Flight Crew Last 90 Days 72|
Flight Crew Total 10458
Flight Crew Type 9084
|Anomaly||Deviation - Procedural Clearance|
Deviation - Procedural FAR
Deviation - Procedural Published Material / Policy
Deviation - Track / Heading All Types
Depart bos. Clearance was HYLND4 hylnd merto yso.... As filed. First officer loaded the route and I checked it. He inadvertently entered metropolitan into the FMC. Since merto and metropolitan are almost identical; I too missed the error. As it turns out; merto and metropolitan are similar in distance from hylnd. As we passed over hylnd; the FMC started a left turn toward metropolitan. The controller immediately recognized the left turn and instructed us to go to merto. Even as she gave us the phonetic spelling of merto; it still took us three times to recognize the transposition of the right and the T. Of course this is compounded by the relatively similar distances of merto and metropolitan from hylnd.
Original NASA ASRS Text
Title: A flight crew was cleared from BOS via HYLND4 HYLND MERTO YSO but entered HYLND4 HYLND METRO YSO which caused a track deviation after HYLND. The error was very difficult to detect on the FMC even though Company SOP verification was completed during preflight.
Narrative: Depart BOS. Clearance was HYLND4 HYLND MERTO YSO.... As filed. First officer loaded the route and I checked it. He inadvertently entered METRO into the FMC. Since MERTO and METRO are almost identical; I too missed the error. As it turns out; MERTO and METRO are similar in distance from HYLND. As we passed over HYLND; the FMC started a left turn toward METRO. The controller immediately recognized the left turn and instructed us to go to MERTO. Even as she gave us the phonetic spelling of MERTO; it still took us three times to recognize the transposition of the R and the T. Of course this is compounded by the relatively similar distances of MERTO and METRO from HYLND.
Data retrieved from NASA's ASRS site 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.