Air carrier medium large transport altitude deviation overshot altitude crossing restriction on SID ...

Attributes
ACN	146543
Time
Date	199005
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ont
State Reference	CA
Altitude	msl bound lower : 8000 msl bound upper : 9000
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Controlling Facilities	tracon : ont
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : sid enroute : on vectors enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 67 flight time total : 9108 flight time type : 2163
ASRS Report	146543
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : published procedure non adherence : clearance
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Pre-departure clearance was '...pomona four departure, climb and maintain 14000'...'. After takeoff the departure controller's clearance was '... Continue the turn to 280 degree, direct pomona and observe the pomona four restrictions.' climbing through 9000' prior to pomona, ATC called 'descend immediately to 8000', you're supposed to cross pomona at 8000'.' I descended at maximum rate to 8000' MSL, xed pom, then continued with the pomona four departure to 14000' MSL. No traffic was observed in the area and the remainder of the flight was uneventful. In the interest of clear and coordinated communications the initial clearance should have been '...maintain 8000', expect 14000' 5 min after takeoff...', as is common practice in the eastern us also after takeoff, the departure clearance would have been '...direct pomona, cross pomona at 8000' pomona four departure, maintain 14000'.'

Original NASA ASRS Text

Title: ACR MLG ALT DEVIATION OVERSHOT ALT CROSSING RESTRICTION ON SID FROM ONT.

Narrative: PRE-DEP CLRNC WAS '...POMONA FOUR DEP, CLB AND MAINTAIN 14000'...'. AFTER TKOF THE DEP CTLR'S CLRNC WAS '... CONTINUE THE TURN TO 280 DEG, DIRECT POMONA AND OBSERVE THE POMONA FOUR RESTRICTIONS.' CLBING THROUGH 9000' PRIOR TO POMONA, ATC CALLED 'DSND IMMEDIATELY TO 8000', YOU'RE SUPPOSED TO CROSS POMONA AT 8000'.' I DSNDED AT MAX RATE TO 8000' MSL, XED POM, THEN CONTINUED WITH THE POMONA FOUR DEP TO 14000' MSL. NO TFC WAS OBSERVED IN THE AREA AND THE REMAINDER OF THE FLT WAS UNEVENTFUL. IN THE INTEREST OF CLR AND COORDINATED COMS THE INITIAL CLRNC SHOULD HAVE BEEN '...MAINTAIN 8000', EXPECT 14000' 5 MIN AFTER TKOF...', AS IS COMMON PRACTICE IN THE EASTERN U.S. ALSO AFTER TKOF, THE DEP CLRNC WOULD HAVE BEEN '...DIRECT POMONA, CROSS POMONA AT 8000' POMONA FOUR DEP, MAINTAIN 14000'.'

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.

Air carrier medium large transport altitude deviation overshot altitude crossing restriction on SID from ont.