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The flight crew crossed itemm intersection at FL330 instead of at or below FL280 as was assigned by ARTCC.
| Attributes | |
| ACN | 336960 |
| Time | |
| Date | 199605 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sso |
| State Reference | AZ |
| Altitude | msl bound lower : 28000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zab |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 190 flight time total : 7500 |
| ASRS Report | 336960 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 270 flight time total : 5000 flight time type : 1200 |
| ASRS Report | 336951 |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
In cruise at FL350, approximately 5 NM past sso, phoenix center issued clearance to cross itemm at FL280 then continue at pilot's discretion to FL240. First officer calculated descent point of approximately 55 DME. At approximately 45 DME, captain noticed a hydraulic quantity at 2.3 gallons and began discussing whether a leak might be occurring. Took note of time (XA43C) and quantity. Attention diverted from DME until approximately 65 DME, simultaneously started descent as ATC queried about altitude. Crossed itemm approximately FL330. No conflict. ATC made no comment except continue descent to FL240. Follow up call to ZAB revealed no traffic conflict. Hydraulic quantity did not decrease further, hydraulic quantity svced normally at phx.
Original NASA ASRS Text
Title: THE FLC CROSSED ITEMM INTXN AT FL330 INSTEAD OF AT OR BELOW FL280 AS WAS ASSIGNED BY ARTCC.
Narrative: IN CRUISE AT FL350, APPROX 5 NM PAST SSO, PHOENIX CTR ISSUED CLRNC TO CROSS ITEMM AT FL280 THEN CONTINUE AT PLT'S DISCRETION TO FL240. FO CALCULATED DSCNT POINT OF APPROX 55 DME. AT APPROX 45 DME, CAPT NOTICED A HYD QUANTITY AT 2.3 GALLONS AND BEGAN DISCUSSING WHETHER A LEAK MIGHT BE OCCURRING. TOOK NOTE OF TIME (XA43C) AND QUANTITY. ATTN DIVERTED FROM DME UNTIL APPROX 65 DME, SIMULTANEOUSLY STARTED DSCNT AS ATC QUERIED ABOUT ALT. CROSSED ITEMM APPROX FL330. NO CONFLICT. ATC MADE NO COMMENT EXCEPT CONTINUE DSCNT TO FL240. FOLLOW UP CALL TO ZAB REVEALED NO TFC CONFLICT. HYD QUANTITY DID NOT DECREASE FURTHER, HYD QUANTITY SVCED NORMALLY AT PHX.
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.