Altitude deviation occurs when EMB120 aircraft crew fails to monitor altitude assignment control after an altimeter setting change near pdz, ca.

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Attributes
ACN	512150
Time
Date	200105
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : pdz.vortac
State Reference	AB
Altitude	msl bound lower : 12000 msl bound upper : 12500
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tower : mynn.tower
Operator	common carrier : air carrier
Make Model Name	Small Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : psp
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zla.artcc
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 100 flight time total : 4200 flight time type : 870
ASRS Report	512150
Events
Anomaly	altitude deviation : excursion from assigned altitude altitude deviation : overshoot inflight encounter : turbulence non adherence : published procedure non adherence : clearance other anomaly other
Resolutory Action	controller : issued advisory flight crew : returned to assigned altitude flight crew : became reoriented
Supplementary
Problem Areas	Aircraft Environmental Factor Flight Crew Human Performance Weather
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Palm springs departure handed us off to center passing 11000 ft. The first officer was using the autoplt in climb mode with the altitude alert system armed for a 12000 ft level off. By the time I was able to check in the aircraft was leveling off at 12000 ft. Palm springs altimeter was 29.66 and center gave us 29.90 for our destination airport lax. This was set in the captain and first officer altimeters which put the aircraft 300 ft high (12300 ft). I told the first officer to use the autoplt altitude adjustment rocker switch to correct the altitude. This automated mode was not working fast enough so the first officer disconnected the autoplt and manually corrected altitude to our assigned altitude of 12000 ft. ATC told us to 'stop climb' at 12500 ft while we were correcting the problem. We told no TA's or traffic on our TCASII which was set at 15 NM. Corrective change suggestion- if high barometric changes are to occur between controlling agencies, pilots should be advised.

Original NASA ASRS Text

Title: ALT DEV OCCURS WHEN EMB120 ACFT CREW FAILS TO MONITOR ALT ASSIGNMENT CTL AFTER AN ALTIMETER SETTING CHANGE NEAR PDZ, CA.

Narrative: PALM SPRINGS DEP HANDED US OFF TO CTR PASSING 11000 FT. THE FO WAS USING THE AUTOPLT IN CLB MODE WITH THE ALT ALERT SYS ARMED FOR A 12000 FT LEVEL OFF. BY THE TIME I WAS ABLE TO CHK IN THE ACFT WAS LEVELING OFF AT 12000 FT. PALM SPRINGS ALTIMETER WAS 29.66 AND CTR GAVE US 29.90 FOR OUR DEST ARPT LAX. THIS WAS SET IN THE CAPT AND FO ALTIMETERS WHICH PUT THE ACFT 300 FT HIGH (12300 FT). I TOLD THE FO TO USE THE AUTOPLT ALT ADJUSTMENT ROCKER SWITCH TO CORRECT THE ALT. THIS AUTOMATED MODE WAS NOT WORKING FAST ENOUGH SO THE FO DISCONNECTED THE AUTOPLT AND MANUALLY CORRECTED ALT TO OUR ASSIGNED ALT OF 12000 FT. ATC TOLD US TO 'STOP CLB' AT 12500 FT WHILE WE WERE CORRECTING THE PROB. WE TOLD NO TA'S OR TFC ON OUR TCASII WHICH WAS SET AT 15 NM. CORRECTIVE CHANGE SUGGESTION- IF HIGH BAROMETRIC CHANGES ARE TO OCCUR BTWN CONTROLLING AGENCIES, PLTS SHOULD BE ADVISED.

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.