<< >> NASA ASRS Report 440950, June 1999

A B737-200 flight crew leaves their assigned altitude for one that was assigned to another air carrier flight northeast of pvd, ri.

Attributes
ACN	440950
Time
Date	199906
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : pvd.vortac
State Reference	RI
Altitude	msl bound lower : 9000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : a90.tracon
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 04r other vortac
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 215 flight time total : 5600 flight time type : 1100
ASRS Report	440950
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance
Supplementary
Problem Areas	ATC Human Performance Airspace Structure Flight Crew Human Performance Environmental Factor
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While on a heading of 070 degrees on a vector for bos ILS runway 4R, just northeast of pvd, I understood bos approach to give us an altitude assignment of 6000 ft MSL (ie, we were level at 11000 ft MSL). I then set 6000 ft in the altitude window as the captain, who was not flying, responded to approach with our call sign and the new altitude assignment. Bos approach did not respond (frequency 120.6). While passing 9000 ft MSL, bos approach queried us about our altitude, and we told him passing 9000 ft MSL for 6000 ft MSL. He told us to level at 9000 ft and that we had not been cleared to 6000 ft.

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Original NASA ASRS Text

Title: A B737-200 FLC LEAVES THEIR ASSIGNED ALT FOR ONE THAT WAS ASSIGNED TO ANOTHER ACR FLT NE OF PVD, RI.

Narrative: WHILE ON A HDG OF 070 DEGS ON A VECTOR FOR BOS ILS RWY 4R, JUST NE OF PVD, I UNDERSTOOD BOS APCH TO GIVE US AN ALT ASSIGNMENT OF 6000 FT MSL (IE, WE WERE LEVEL AT 11000 FT MSL). I THEN SET 6000 FT IN THE ALT WINDOW AS THE CAPT, WHO WAS NOT FLYING, RESPONDED TO APCH WITH OUR CALL SIGN AND THE NEW ALT ASSIGNMENT. BOS APCH DID NOT RESPOND (FREQ 120.6). WHILE PASSING 9000 FT MSL, BOS APCH QUERIED US ABOUT OUR ALT, AND WE TOLD HIM PASSING 9000 FT MSL FOR 6000 FT MSL. HE TOLD US TO LEVEL AT 9000 FT AND THAT WE HAD NOT BEEN CLRED TO 6000 FT.

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.