A first officer with less than 100 hours in type shut the APU down after starting engine 1 and then;...

Attributes
ACN	982027
Time
Date	201111
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	EMB ERJ 170/175 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Component
Aircraft Component	APU
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Commercial
Experience	Flight Crew Total 1600 Flight Crew Type 100
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy

Narrative:

I accidentally turned off the APU after starting engine #1 and did not realize it when we single engine taxied. During engine start I knew something was wrong because the itt was slow to start and then continued to increase beyond a normal temperature for start. I pointed this out to the captain and he had me shut it down well before reaching the maximum itt for engine start. All engine parameters were normal during and after the 2nd start. I should not have turned off the APU after the first engine start. From now on; I will make sure that both engine's are running before turning it off and I will double check that the APU is running for all engine starts. I am a new first officer with 100 hours in the erj and my captain was still green.

Original NASA ASRS Text

Title: A First Officer with less than 100 hours in type shut the APU down after starting engine 1 and then; while starting engine number 2 without APU air; noticed the ITT rise rapidly so the green Captain commanded the engine shutdown.

Narrative: I accidentally turned off the APU after starting engine #1 and did not realize it when we single engine taxied. During engine start I knew something was wrong because the ITT was slow to start and then continued to increase beyond a normal temperature for start. I pointed this out to the Captain and he had me shut it down well before reaching the maximum ITT for engine start. All engine parameters were normal during and after the 2nd start. I should not have turned off the APU after the first engine start. From now on; I will make sure that both engine's are running before turning it off and I will double check that the APU is running for all engine starts. I am a new First Officer with 100 hours in the ERJ and my Captain was still green.

Data retrieved from NASA's ASRS site as of April 2012 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.

A first officer with less than 100 hours in type shut the APU down after starting engine 1 and then; while starting engine number 2 without APU air; noticed the itt rise rapidly so the green captain commanded the engine shutdown.