<< >> NASA ASRS Report 335763, May 1996

First officer of a B757-223 overshot localizer course and started descent before being cleared for the approach and then corrected back at the direction of the captain.

Attributes
ACN	335763
Time
Date	199605
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : den
State Reference	CO
Altitude	msl bound lower : 9700 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : den
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 165 flight time total : 17000 flight time type : 3400
ASRS Report	335763
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

First officer was PF, I was PIC and performing duties of PNF. We were cleared to intercept runway 7 localizer and maintain 10000 ft altitude. This was a change from our previous planned approach (visual to runway 16) with first officer on intercept heading, I looked to radio control to retune radios for new approach. When I looked back at flight instruments, first officer had flown through localizer and initiated a descent through 9700 ft. I told him to turn to intercept localizer and climb back to 10000 ft. He did both. Subsequently cleared to descend to 8000 ft then cleared for approach. First officer had elected to fly approach using only raw data (no FMS or flight director). This was my first time flying with this pilot. To preclude this from recurring, I may require unfamiliar crew member to use all available resources until I'm confident in their abilities.

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Original NASA ASRS Text

Title: FO OF A B757-223 OVERSHOT LOC COURSE AND STARTED DSCNT BEFORE BEING CLRED FOR THE APCH AND THEN CORRECTED BACK AT THE DIRECTION OF THE CAPT.

Narrative: FO WAS PF, I WAS PIC AND PERFORMING DUTIES OF PNF. WE WERE CLRED TO INTERCEPT RWY 7 LOC AND MAINTAIN 10000 FT ALT. THIS WAS A CHANGE FROM OUR PREVIOUS PLANNED APCH (VISUAL TO RWY 16) WITH FO ON INTERCEPT HDG, I LOOKED TO RADIO CTL TO RETUNE RADIOS FOR NEW APCH. WHEN I LOOKED BACK AT FLT INSTS, FO HAD FLOWN THROUGH LOC AND INITIATED A DSCNT THROUGH 9700 FT. I TOLD HIM TO TURN TO INTERCEPT LOC AND CLB BACK TO 10000 FT. HE DID BOTH. SUBSEQUENTLY CLRED TO DSND TO 8000 FT THEN CLRED FOR APCH. FO HAD ELECTED TO FLY APCH USING ONLY RAW DATA (NO FMS OR FLT DIRECTOR). THIS WAS MY FIRST TIME FLYING WITH THIS PLT. TO PRECLUDE THIS FROM RECURRING, I MAY REQUIRE UNFAMILIAR CREW MEMBER TO USE ALL AVAILABLE RESOURCES UNTIL I'M CONFIDENT IN THEIR ABILITIES.

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.