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Flight crew unable to read amendment to clearance--overshot amended clearance altitude.
| Attributes | |
| ACN | 124904 |
| Time | |
| Date | 198910 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : mjzs |
| State Reference | PR |
| Altitude | msl bound lower : 27000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : dca |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | enroute : atlantic enroute airway : mjzs |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 124 flight time total : 6112 flight time type : 667 |
| ASRS Report | 124904 |
| Person 2 | |
| 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 : 400 |
| ASRS Report | 124914 |
| Events | |
| Anomaly | altitude deviation : overshoot |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
When ZMA switched us to sju center, we were unable to contact them for 5 mins. Upon contact their radio xmissions were broken and we reported same. At 160 NM from sju we were issued a clearance to descend 'pilot's discretion to cross 40 NM west of 10000'.' this clearance took 2 xmissions because mjzs was breaking up. We started a descent at 140 NM sju. As we were passing FL320 mjzs called us and said something about FL290, but he was broken up. I repeated that we were out of FL320 for 10000', and he was breaking up. Upon descending through FL270 center asked our altitude. I sated FL270, descending to 10000'. Center said our clearance had been changed to FL290, but to continue the descent to cross 40 NM from sju at 10000'. There was no mention of a traffic conflict. This transmission was loud and clear.
Original NASA ASRS Text
Title: FLT CREW UNABLE TO READ AMENDMENT TO CLRNC--OVERSHOT AMENDED CLRNC ALT.
Narrative: WHEN ZMA SWITCHED US TO SJU CENTER, WE WERE UNABLE TO CONTACT THEM FOR 5 MINS. UPON CONTACT THEIR RADIO XMISSIONS WERE BROKEN AND WE RPTED SAME. AT 160 NM FROM SJU WE WERE ISSUED A CLRNC TO DSND 'PLT'S DISCRETION TO CROSS 40 NM W OF 10000'.' THIS CLRNC TOOK 2 XMISSIONS BECAUSE MJZS WAS BREAKING UP. WE STARTED A DSCNT AT 140 NM SJU. AS WE WERE PASSING FL320 MJZS CALLED US AND SAID SOMETHING ABOUT FL290, BUT HE WAS BROKEN UP. I REPEATED THAT WE WERE OUT OF FL320 FOR 10000', AND HE WAS BREAKING UP. UPON DSNDING THROUGH FL270 CENTER ASKED OUR ALT. I SATED FL270, DSNDING TO 10000'. CENTER SAID OUR CLRNC HAD BEEN CHANGED TO FL290, BUT TO CONTINUE THE DSCNT TO CROSS 40 NM FROM SJU AT 10000'. THERE WAS NO MENTION OF A TFC CONFLICT. THIS XMISSION WAS LOUD AND CLEAR.
Data retrieved from NASA's ASRS site as of August 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.