<< >> NASA ASRS Report 770383, January 2008

Air carrier on wevic RNAV SID from slc fails to cross zoobe at 14000. Believe clearance to climb to 16000 canceled intervening restrictions.

Attributes
ACN	770383
Time
Date	200801
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : slc.airport
State Reference	UT
Altitude	msl single value : 16000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zlc.artcc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 344 flight time type : 4000
ASRS Report	770383
Events
Anomaly	altitude deviation : crossing restriction not met non adherence : published procedure non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Chart Or Publication ATC Human Performance Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

On the wevic SID we were cleared to 16000 ft. We assumed we were cleared unrestr to this altitude. Once at that altitude; ZLC informed us that we should have crossed zoobe at 14000 ft. Controller informed us of possible ATC deviation. Controller informed us that although we were not the first to deviation from clearance; we were given the dreaded phone number to call. Honestly; I feel that the captain and I were not in error and that the clearance was misleading and confusing. ATC appeared not to be busy at this time of day and if there had been issues with this new SID; perhaps they could have clarified this 'area of confusion.' callback conversation with reporter revealed the following information: reporter could not recall whether the cleared altitude as shown on the SID was also provided in the airways clearance prior to takeoff. He advised the departure controller had issued a clearance to 16000 when they first checked on after takeoff. They assumed this canceled the intervening charted limitations at myrup and zoobe.

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Original NASA ASRS Text

Title: ACR ON WEVIC RNAV SID FROM SLC FAILS TO CROSS ZOOBE AT 14000. BELIEVE CLRNC TO CLIMB TO 16000 CANCELED INTERVENING RESTRICTIONS.

Narrative: ON THE WEVIC SID WE WERE CLRED TO 16000 FT. WE ASSUMED WE WERE CLRED UNRESTR TO THIS ALT. ONCE AT THAT ALT; ZLC INFORMED US THAT WE SHOULD HAVE CROSSED ZOOBE AT 14000 FT. CTLR INFORMED US OF POSSIBLE ATC DEV. CTLR INFORMED US THAT ALTHOUGH WE WERE NOT THE FIRST TO DEV FROM CLRNC; WE WERE GIVEN THE DREADED PHONE NUMBER TO CALL. HONESTLY; I FEEL THAT THE CAPT AND I WERE NOT IN ERROR AND THAT THE CLRNC WAS MISLEADING AND CONFUSING. ATC APPEARED NOT TO BE BUSY AT THIS TIME OF DAY AND IF THERE HAD BEEN ISSUES WITH THIS NEW SID; PERHAPS THEY COULD HAVE CLARIFIED THIS 'AREA OF CONFUSION.' CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER COULD NOT RECALL WHETHER THE CLEARED ALT AS SHOWN ON THE SID WAS ALSO PROVIDED IN THE AIRWAYS CLRNC PRIOR TO TKOF. HE ADVISED THE DEP CTLR HAD ISSUED A CLRNC TO 16000 WHEN THEY FIRST CHECKED ON AFTER TKOF. THEY ASSUMED THIS CANCELED THE INTERVENING CHARTED LIMITATIONS AT MYRUP AND ZOOBE.

Data retrieved from NASA's ASRS site as of May 2009 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.