AN MU2 FLC OVERSHOT THEIR ASSIGNED ALT WHEN THE PIC SITTING IN THE R SEAT SETS THE ALT ALERTER TO THE WRONG ALT. POTENTIAL CONFLICT ENSUES.

Narrative

THIS FLT WAS OPERATED AS A PART 135; UNSCHEDULED OP CARRYING BANK CHKS FOR THE FEDERAL RESERVE. I WAS PIC; ACTING AS PNF; SITTING IN THE R SEAT. THE PLT IN THE L SEAT WAS PIC QUALIFIED AND CURRENT IN TYPE. WE HAD DEPARTED RWY 17 ON THE PHL 6 DEP; AND WERE ASSIGNED RWY HDG TO 5000 FT. DEP CTL VECTORED US TO THE SW; THEN TOLD US TO PROCEED DIRECT TO DUPONT VOR; WHICH WAS ABOUT 20 NM W OF OUR POS. THE DASH 8 HAD DEPARTED RWY 27L AND WAS CLBING TO 8000 FT DIRECT TO DUPONT. OUR OPS ARE USUALLY CONDUCTED SINGLE PLT; AND NO CRM HAS BEEN INCLUDED IN ANY OF OUR COMPANY TRAINING. ON THIS FLT; THE PF HAD BEEN ASSIGNED AS A SIC TO BUILD EXPERIENCE WITH A QUALIFIED CAPT; BEFORE BEING RELEASED ON HIS OWN. WE WERE USING A PORTABLE INTERCOM TO COMMUNICATE; WHICH WAS NOT WORKING VERY WELL; AND INTRACOCKPIT COMS WERE VERY LIMITED. THE PF WAS DOING ALL THE FLYING AND WORKING THE RADIOS. I WAS JUST OBSERVING; YET WAS THE ASSIGNED PIC. ADDING TO THE CONFUSION WAS THE USE OF THE ALT ALERTER. THIS PARTICULAR ALERTER HAS 4 DIALS TO DIAL IN THE ALT; WITH EACH DIAL MOVING 1 DIGIT. THE ALERTER MAKES A CONTINUOUS LOUD TONE FROM 1000 FT BELOW TO 200 FT BELOW THE SELECTED ALT. NORMALLY; THIS IS NO PROB. HOWEVER; WHEN USING THE PORTABLE INTERCOM; THE MIKE ON THE PLT'S HEADSET PICKS UP THE ALERTER'S TONE AND IT OVERWHELMS THE VOLUME ON THE RADIOS AND VOICE ON THE INTERCOM. IT IS ALSO QUITE UNCOMFORTABLE. WE HAD GOTTEN AROUND THIS BY SELECTING AN ALT 10000 FT ABOVE OUR ASSIGNED ALT ON THE ALERTER; SO THAT THE CHIME WOULD NOT GO OFF; BUT THE ALERTER WOULD STILL PROVIDE A VISUAL REMINDER TO THE PLT IN THE L SEAT; AS IT IS NOT VISIBLE FROM THE R SEAT. SO; ON THE MORNING OF DEC/XA/99 WE DEPARTED RWY 17; AND WERE TURNED TOWARDS DQO. WE HAD THE DASH 8 IN SIGHT; AND WERE CLBING TO 5000 FT. AT 4000 FT THE ALERTER WENT OFF; AND I REACHED OVER TO SELECT 15000 FT INSTEAD OF 5000 FT. UNFORTUNATELY; I SELECTED 6000 FT; BECAUSE I TURNED THE WRONG KNOB; AND DID NOT REALIZE THIS. THE PF ASSUMED WE WERE CLRED TO 6000 FT AND CONTINUED THE CLB TO 6000 FT. ATC ADVISED US OF TFC AT 12 O'CLOCK; 3 MI; A DASH 8 CLBING THROUGH 6800 FT FOR 8000 FT; AND WE REPLIED THAT WE HAD THEM IN SIGHT. THEN ATC TOLD US THAT THEY HAD NOT YET CLRED US TO 6000 FT; OUR ENRTE CRUISING ALT; BUT TO MAINTAIN IT NOW. I FEEL THIS DEV OCCURRED BECAUSE OF SEVERAL REASONS: 1) A LACK OF FORMAL CRM TRAINING BECAUSE OF THE PREDOMINANT SINGLE PLT OP. 2) NONSTANDARD USE OF THE ALT ALERTER AND PORTABLE INTERCOM CAUSING A BREAKDOWN IN CRM. 3) THE EFFECTS OF CHRONIC FATIGUE. THIS WAS THE LAST LEG OF THE WK; DURING WHICH 4 NIGHT; 24 HRS AND 24 LNDGS. THIS LED TO BOTH PLTS TAKING A REST RIGHT BEFORE THE FINAL WAKE- UP; TAXI AND TKOF WITHIN 20 MINS. WHILE WX WAS CHKED AND PAPERWORK COMPLETED; THE AIRPLANE WAS LOADED AND WE LEFT IN A SOMEWHAT TIRED; SEMI-ALERT CONDITION.