Qnh not set resulting in altitude overshoot near ewr, nj.

Attributes
ACN	468640
Time
Date	200004
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : hayed
State Reference	NJ
Altitude	msl bound lower : 16500 msl bound upper : 17000
Environment
Flight Conditions	Marginal
Weather Elements	Turbulence
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny.artcc
Operator	common carrier : air carrier
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zny.artcc
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise : level
Person 1
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : commercial pilot : multi engine pilot : instrument pilot : atp
Experience	flight time last 90 days : 180 flight time total : 7500 flight time type : 3500
ASRS Report	468640
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment : tcas other controllerb
Resolutory Action	controller : issued alert flight crew : took evasive action
Miss Distance	vertical : 500
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were descending to cross hayed intersection at FL190 on the williamsport arrival to ewr. It was moderately turbulent in the descent. Out of FL195 we were reclred to 17000 ft and acknowledged. We were distraction at this time and failed to reset our altimeters to the new low setting of 29.42 and leveled at 17000 ft indicated. Upon receiving an RA on TCASII from crossing traffic we had in sight, the controller inquired about our altitude. At that time we had already reset the altimeter and were on our way back to 17000 ft. He said we were at 16500 ft which was correct, but we said we were at 17000 ft. Apparently the crossing traffic had to respond to a descend RA from TCASII. We proceeded to ewr normally and so did the other aircraft.

Original NASA ASRS Text

Title: QNH NOT SET RESULTING IN ALT OVERSHOOT NEAR EWR, NJ.

Narrative: WE WERE DSNDING TO CROSS HAYED INTXN AT FL190 ON THE WILLIAMSPORT ARR TO EWR. IT WAS MODERATELY TURBULENT IN THE DSCNT. OUT OF FL195 WE WERE RECLRED TO 17000 FT AND ACKNOWLEDGED. WE WERE DISTR AT THIS TIME AND FAILED TO RESET OUR ALTIMETERS TO THE NEW LOW SETTING OF 29.42 AND LEVELED AT 17000 FT INDICATED. UPON RECEIVING AN RA ON TCASII FROM XING TFC WE HAD IN SIGHT, THE CTLR INQUIRED ABOUT OUR ALT. AT THAT TIME WE HAD ALREADY RESET THE ALTIMETER AND WERE ON OUR WAY BACK TO 17000 FT. HE SAID WE WERE AT 16500 FT WHICH WAS CORRECT, BUT WE SAID WE WERE AT 17000 FT. APPARENTLY THE XING TFC HAD TO RESPOND TO A DSND RA FROM TCASII. WE PROCEEDED TO EWR NORMALLY AND SO DID THE OTHER ACFT.

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.