A C182 aircraft loses its vacuum pump, requiring the CFI flying the flight to obtain a block altitude and a no gyro approach after leaving their assigned altitude 70 NM from new destination airport at sgr, tx.

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Attributes
ACN	563049
Time
Date	200210
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sgr.airport
State Reference	TX
Altitude	msl single value : 7000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zhu.artcc tower : slk.tower
Operator	general aviation : personal
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Flight Phase	cruise : enroute altitude change cruise : level descent : approach
Flight Plan	IFR
Person 1
Affiliation	other
Qualification	pilot : private
Experience	flight time last 90 days : 11 flight time total : 776 flight time type : 395
ASRS Report	563049
Person 2
Affiliation	other
Function	oversight : pic
Qualification	pilot : cfi
Events
Anomaly	aircraft equipment problem : critical altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist controller : issued new clearance flight crew : diverted to another airport flight crew : landed in emergency condition other
Consequence	faa : reviewed incident with flight crew other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft ATC Human Performance Weather
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

While my aircraft was on an IFR flight plan with a CFI as PIC, we experienced a vacuum pump failure resulting in partial panel ctrl in IMC. Upon loss of vacuum pump the PIC (CFI) descended from our assigned altitude in IMC to VFR below the ceiling, and reported our problem to ATC. CFI continued flight in VFR with ATC flight following until due to lowering ceiling, we were unable to continue VFR and requested ATC assistance. ATC provided instructions to PIC (CFI) as to headings and assigned a black altitude in order to avoid terrain and obstacles and to maintain radar contact. Due to PIC's inability to maintain precise headings with magnetic compass, ATC began a radar approach for us to the ILS approach at sgr. CFI (PIC) intercepted ILS and at approximately 1300 ft MSL, aircraft descended into VFR on the glide slope. Aircraft continued VFR for a landing at sgr. Tower requested that we park at the sgr terminal and call the tower on the telephone. The CFI (PIC) complied and discussed the difficulties of maintaining heading. No damage to aircraft or injuries to passenger or crew.

Original NASA ASRS Text

Title: A C182 ACFT LOSES ITS VACUUM PUMP, REQUIRING THE CFI FLYING THE FLT TO OBTAIN A BLOCK ALT AND A NO GYRO APCH AFTER LEAVING THEIR ASSIGNED ALT 70 NM FROM NEW DEST ARPT AT SGR, TX.

Narrative: WHILE MY ACFT WAS ON AN IFR FLT PLAN WITH A CFI AS PIC, WE EXPERIENCED A VACUUM PUMP FAILURE RESULTING IN PARTIAL PANEL CTRL IN IMC. UPON LOSS OF VACUUM PUMP THE PIC (CFI) DESCENDED FROM OUR ASSIGNED ALTITUDE IN IMC TO VFR BELOW THE CEILING, AND RPTED OUR PROB TO ATC. CFI CONTINUED FLT IN VFR WITH ATC FLT FOLLOWING UNTIL DUE TO LOWERING CEILING, WE WERE UNABLE TO CONTINUE VFR AND REQUESTED ATC ASSISTANCE. ATC PROVIDED INSTRUCTIONS TO PIC (CFI) AS TO HDGS AND ASSIGNED A BLACK ALT IN ORDER TO AVOID TERRAIN AND OBSTACLES AND TO MAINTAIN RADAR CONTACT. DUE TO PIC'S INABILITY TO MAINTAIN PRECISE HDGS WITH MAGNETIC COMPASS, ATC BEGAN A RADAR APCH FOR US TO THE ILS APCH AT SGR. CFI (PIC) INTERCEPTED ILS AND AT APPROX 1300 FT MSL, ACFT DESCENDED INTO VFR ON THE GLIDE SLOPE. ACFT CONTINUED VFR FOR A LNDG AT SGR. TWR REQUESTED THAT WE PARK AT THE SGR TERMINAL AND CALL THE TWR ON THE TELEPHONE. THE CFI (PIC) COMPLIED AND DISCUSSED THE DIFFICULTIES OF MAINTAINING HDG. NO DAMAGE TO ACFT OR INJURIES TO PAX OR CREW.

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.