Citation Flight Notes
July 3, 2002

Crew:  	Le Hardy, Martin, Poellot, Twohy, DeMott

171444  	Takeoff
	C1  DHP 278/065
	C2  DHP 139/019

Flight data times on raw tape are UTC –2 hours. 2 hours will be added in processing

Went through thin cloud between about 230 and 240.

173910	Turning to establish on sample line eastbound. CFDC not cooling. At FL 290.
174710	Switching to pitot nose source – wing source went bad. Entering cloud.
174940	Out of cloud
175635	Turn and climb at C2. In cirrus in the turn.
180430	Back in cirrus, FL 310. Cirrus at line midpoint and at C2.
180845	Starting turn. Stuck at FL 310 for ATC.
181210	Established, heading 100.  New point H2 – 270/029 – for spiral down.
181710	Begin spiral down around H3.
182400	Pitot nose is plugging up. A/C IAS about 150 kts.
~1826	Pitot nose OK
183130	FL 252. HVPS right-hand side only showing images.
183430	FL 240, bottom of ATC block clearance. Will start spiral up @1000 fpm.
184330	Double halo around sun.
184445	Out of top. We’ll spiral back down.
185200	In descent spiral, 500 fpm. CN alarm.
185800	HVPS hung bit.
190100	HVPS solid bars. IAS OK.
190230	Out of cloud.
190615	HVPS images in two streaks. 
	A4  283/021
	A5  253/062
190752	Hung bit again.
190925	Cirrus is broken, thin.
191200	Transit to A4, in clear, cirrus above (fairly thin).
192030	Climbing, not in cirrus
192500	Level at FL 290, in clear.
192620	Reversing
192900	Heading 055, past A5, in clear, cirrus ahead.
193400	Just under cirrus.
193450	In cirrus (just barely), 12 nm from A5.
193900	Waiting for clearance to reverse and climb.
194500	Have reversed, no climb clearance.
194745	Few ice crystals.
195700	Balance EG&G dew point.
195810	FL 300 in cirrus, eastbound, aggregates.
200030	Very light turbulence.
200320	A4, turn and climb to FL 310.
200530	Heading 240, FL 310.
200510	In cirrus, plates. Temp –37. Nothing on HVPS.
201000	In thin cirrus, haze.
201115	HVP hung bit, clear air.
201415	FL 320, heading 065.
201710	Back in cirrus. Occasional 2dc hung bits.
201930	End leg. Turn and climb to FL 330.
202150	Level 330, in cirrus.
202530	End leg, requesting higher – have to wait.
202900	Level 330, heading 070.
203100	Just started VCR.
203312	Starting climb, in cirrus, close to top.
203500	FL 340, 100-200 um columns, low aspect ratio.
203910	End leg, 34,000’, turn and climb.
204115	35,000’, heading 045.
204745	A4. Done sampling.
204930	Lost inverter 3 for about a minute.
211000	In rainshower.
211650	Land

4.0 hours.

Summary:  
1. Sampled cirrus on line C1/C2. Cirrus at C2 and about 2/3 of the way to the west.
2. Did spirals at H3 between FL 240 and FL 310.
3. Stepped up from FL 290 to FL 350 on A4/A5 line