Flight crew forgot to release the propeller brake on 1 engine and taxied into position for takeoff. Upon takeoff clearance noticed that there was no engine torque or AC generator 'on line' or engine torque indication.

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Attributes
ACN	273165
Time
Date	199406
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ewr
State Reference	NJ
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	ATR 42
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	ground : holding ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 6000 flight time type : 700
ASRS Report	273165
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

Taxi out to runway with propeller brake on, did not notice until cleared for takeoff. Started engines as normal but somehow missed throwing propeller brake switch to off during the start engine flow. When item was covered on the checklist, I checked the position of the switch and it looked right. However, on our mixed fleet of ATR 42 aircraft the position for on and off (ie: up being on and off being down) is reversed. Even though it is labeled, it just looked correct and I missed it. Taxi out seemed normal due to power steering. When cleared for takeoff we noticed the acw generator was not on line and torque was not registering, at this point we realized what had happened. We informed the tower that we needed to taxi off the runway for a precautionary check. After clearing, we got the propeller turning, did the appropriate checklists over and then proceeded as normal. Lesson learned: check the switch then check the gauges! That goes for me as well as first officer. As a back up: it would be nice if the confign warning included an alarm whenever condition lever is advanced with propeller brake engaged.

Original NASA ASRS Text

Title: FLC FORGOT TO RELEASE THE PROP BRAKE ON 1 ENG AND TAXIED INTO POS FOR TKOF. UPON TKOF CLRNC NOTICED THAT THERE WAS NO ENG TORQUE OR AC GENERATOR 'ON LINE' OR ENG TORQUE INDICATION.

Narrative: TAXI OUT TO RWY WITH PROP BRAKE ON, DID NOT NOTICE UNTIL CLRED FOR TKOF. STARTED ENGS AS NORMAL BUT SOMEHOW MISSED THROWING PROP BRAKE SWITCH TO OFF DURING THE START ENG FLOW. WHEN ITEM WAS COVERED ON THE CHKLIST, I CHKED THE POS OF THE SWITCH AND IT LOOKED RIGHT. HOWEVER, ON OUR MIXED FLEET OF ATR 42 ACFT THE POS FOR ON AND OFF (IE: UP BEING ON AND OFF BEING DOWN) IS REVERSED. EVEN THOUGH IT IS LABELED, IT JUST LOOKED CORRECT AND I MISSED IT. TAXI OUT SEEMED NORMAL DUE TO PWR STEERING. WHEN CLRED FOR TKOF WE NOTICED THE ACW GENERATOR WAS NOT ON LINE AND TORQUE WAS NOT REGISTERING, AT THIS POINT WE REALIZED WHAT HAD HAPPENED. WE INFORMED THE TWR THAT WE NEEDED TO TAXI OFF THE RWY FOR A PRECAUTIONARY CHK. AFTER CLRING, WE GOT THE PROP TURNING, DID THE APPROPRIATE CHKLISTS OVER AND THEN PROCEEDED AS NORMAL. LESSON LEARNED: CHK THE SWITCH THEN CHK THE GAUGES! THAT GOES FOR ME AS WELL AS FO. AS A BACK UP: IT WOULD BE NICE IF THE CONFIGN WARNING INCLUDED AN ALARM WHENEVER CONDITION LEVER IS ADVANCED WITH PROP BRAKE ENGAGED.

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.