 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Flight crew deviation occurs when first officer starts aircraft down from FL350 to FL250. He had just affirmed a speed reduction to 250 KTS and then said, 'out of FL350 for FL250.' first officer criticizes controller's phraseology. Captain was just returning to cockpit.
| Attributes | |
| ACN | 379330 |
| Time | |
| Date | 199709 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : atl |
| State Reference | GA |
| Altitude | msl bound lower : 34000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl |
| Operator | common carrier : air carrier |
| Make Model Name | L-1011-500 Series |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other descent other |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : instrument pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 23000 flight time type : 3000 |
| ASRS Report | 379330 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 280 flight time total : 18000 flight time type : 4500 |
| ASRS Report | 379675 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation Operational Deviation |
Narrative:
Inbound to atl on J48. We were 20 mi in trail of other company flight. I (captain) left cockpit to use the lavatory. When I returned, the first officer had left FL350 for FL250. Controller had told other flight to maintain 250 KTS when able. He then said, 'our call sign, same for you, maintain two-five- zero.' the first officer heard this as a clearance to FL250 and started descent. Passing through FL340 ATC called and said, 'our call sign, verify level FL350.' we answered, 'negative, out of FL340 for FL250.' controller said, 'climb to FL350 and turn right to 270 degrees, traffic at 11 O'clock and 10 mi.' we complied and when level at FL350, we were vectored back to J48 and continued to atl. Supplemental information from acn 379675: controller: 'our flight the same for you as well, maintain 250.' first officer: 'our flight, roger maintain 250 KTS when able, out of 350 for 250.' supplemental information from acn 379738: the captain had left the cockpit for a bathroom break and was just returning. I was opening the door for him and missed this radio call. The first officer answered the call and understood that we were cleared to FL25O, and began a descent.
Original NASA ASRS Text
Title: FLC DEV OCCURS WHEN FO STARTS ACFT DOWN FROM FL350 TO FL250. HE HAD JUST AFFIRMED A SPD REDUCTION TO 250 KTS AND THEN SAID, 'OUT OF FL350 FOR FL250.' FO CRITICIZES CTLR'S PHRASEOLOGY. CAPT WAS JUST RETURNING TO COCKPIT.
Narrative: INBOUND TO ATL ON J48. WE WERE 20 MI IN TRAIL OF OTHER COMPANY FLT. I (CAPT) LEFT COCKPIT TO USE THE LAVATORY. WHEN I RETURNED, THE FO HAD LEFT FL350 FOR FL250. CTLR HAD TOLD OTHER FLT TO MAINTAIN 250 KTS WHEN ABLE. HE THEN SAID, 'OUR CALL SIGN, SAME FOR YOU, MAINTAIN TWO-FIVE- ZERO.' THE FO HEARD THIS AS A CLRNC TO FL250 AND STARTED DSCNT. PASSING THROUGH FL340 ATC CALLED AND SAID, 'OUR CALL SIGN, VERIFY LEVEL FL350.' WE ANSWERED, 'NEGATIVE, OUT OF FL340 FOR FL250.' CTLR SAID, 'CLB TO FL350 AND TURN R TO 270 DEGS, TFC AT 11 O'CLOCK AND 10 MI.' WE COMPLIED AND WHEN LEVEL AT FL350, WE WERE VECTORED BACK TO J48 AND CONTINUED TO ATL. SUPPLEMENTAL INFO FROM ACN 379675: CTLR: 'OUR FLT THE SAME FOR YOU AS WELL, MAINTAIN 250.' FO: 'OUR FLT, ROGER MAINTAIN 250 KTS WHEN ABLE, OUT OF 350 FOR 250.' SUPPLEMENTAL INFO FROM ACN 379738: THE CAPT HAD LEFT THE COCKPIT FOR A BATHROOM BREAK AND WAS JUST RETURNING. I WAS OPENING THE DOOR FOR HIM AND MISSED THIS RADIO CALL. THE FO ANSWERED THE CALL AND UNDERSTOOD THAT WE WERE CLRED TO FL25O, AND BEGAN A DSCNT.
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.