Below is a list of the instrument problems based on instrument performance during the January 29, 2010 flights, previous flights and ground testing.

• 2D-C

During all recent flights the 2D-C has experience problems with shadowing bits that should not be shadowed. The problem comes and goes. The problem seems to be more pronounced when the end element voltages are low.

• Aircraft GPS Data

The Aircraft GPS data base was updated before the January 29, 2010 flight. This seem to have changed the output data stream and resulted in useless data being outputted to the M300.

• Analog to Digital Converter

The Wing Pitot pressure is wired up backwards. This should be changed and calibration constants adjusted.

The right wing OID voltage measurements has a short in it that comes and goes.

Several (e.g. OID volt measurement) of the channels have voltages that are different (several tenths of a volt) than a voltage meter measurement, while others are very similar.

• Applanix Position and Orientation System (POS)

Data (200 Hz High Frequency) is not saved correctly to the PCMCIA card. Only one file is save per flight and it is very short.

The heading offset of the Applanix has not been determined for the current installation.

• Basic Combine Inlet Sampling System

The full Inlet samplying system has not been leak tested for the current installation.

• Cloud Droplet Probe (CDP)

The probe is not counting particles correctly as indicated by LWC comparison with the King Hot wire probe.

DMT needs to replace the pin hole with a smaller size pin hole.

DMT needs to do a firmware upgrade so the probe sizes droplets correctly at low (< -25 C) temperatures.

We need to get the latest version of the PAC software from DMT.

The data stream from the probe drops out during flights and the probe has to be restarted to get the data back. This happen at least once during the January 29, 2010 flights.

Modification to use it's own data buffer in the M300 configuration resulted in not being able to obtain any data. This modification was done so that we would have an indication that we were getting data from the CDP.

• Condensation Particle Counter (CPC)

There is fluid that develops in the lines during flights. This results in low counts after some point.

• Cloud Particle Imager (CPI)

During the January 29, 2010 flight, when trying to start the CPI, all instruments on the circuit would lose power. The breaker would not be tripped. This happen even when the CPI was the only instrument on the circuit.

• Dew Point Temperature Sensor (Hygrometer - Model 137)

The dew point temperature was high on the last leg on the January 29, 2010 flights. Heating the mirror did not fix the problem.

• GPS Antennas

Installation of a GPS repeating antenna in the hanger would allow for testing of GPS equipment and data streams with out bring the aircraft outside.

• Gust Probe

The dynamic pressure sampling line got plugged up when sampling in high crystal counts.

Need to change the M300 software to use the wing Pitot pressure by default.

The IAS is 20 knots low compared to the aircraft system.

• Ice Detector

Need to display serial data information in real time.

• High Volume Precipitation Spectrometer (HVPS)

Only gave noisy images during the January 29, 2010 flights.

• Intellicon NT 960 ACM Flex16 Serial Interface Box

Should upgrade to the latest firmware.

• King Hot Wire Liquid Water Probe

Calibration data was taken on the January 29, 2010 flight. This needs to be processed and applied.

The real time LWC calculations are not working correctly.

• M300 Data System

Many windows would have their 'pause' button activated during flights. This causes problems for the on board personnel and is difficult to fix for the front monitor.

Need to get dew point temperature correct on profile screen (F2).

Need a tray for keyboard and mouse.

• Network

No outside network access to systems on the aircraft to enable trouble shooting problems.

• Optical Icing Conditions Detector (OICD)

A/D line shorting out.

Both window frosted over during the sampling flight. The left window was about 70% and the right about 25%.

• Passive Cavity Aerosol Spectrometer Probe (PCASP)

Probe broken.

• Power Distribution System

No per circuit power budget.

Not right that you would lose A/C power on the CPI circuit without tripping the breaker.

Does not work to power system with external power cord.

• Pressure Transducers

Using backup pressure transducer in the wing. Wing IAS is 10 knots low compare to aircraft.

• Tropospheric Airborne Meteorological Data Reporting (TAMDAR)

The TAMDAR probe is currently in high resolution mode, hence it should only be turn on during flights and not during ground testing. The check list should be modified to include this and a pull breaker holder should be added to ensure that it is not turn on during ground tests.

The LED is located in the nose and should be moved to the cabin to give an indication of when the TAMDAR is on.

Not everyone knows how to access the TAMDAR Web Site data. For example, the UND Aviation staff so they know where the aircraft is. This would be a back up for the Flight Aware system.

• Tunable Diode Laser Hygrometer (TDL)

Pump failed during start of flights on January 29, 2010. Could not get working on this flight. Pump got hot and was turned off. Started working on next flight.

• Temperature Control Box for Pressure Transducers

Not recording or display data from temperature controller.

• Total Temperature Probes

Temperature are within 0.5 degrees but have not be check with temperature standard.