- Difficulty date
- October 1, 2010
- Submitted
- October 5, 2010
- Operation
- Air carrier
- Make and model
- Boeing 747243B
- Aircraft serial
- 23300
- Aircraft time
- 89,588 hours, 15,322 cycles
- Engine
- Ge CF34*
- Part
- Cadc
- Part number
- D0031459
- Part serial
- 3767183
- Condition
- Inoperative
- Location
- Cockpit
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 33.0 CAPT'S ALTIMETER READS 33,020. F/O ALTIMETER 32,520. AT FL 28.0 CAPT'S ALTIMETER READS 28000 F/O 27660. UNABLE TO CONTINUE INTO RVSM AIRSPACE. IAW ATC, CAPT'S & NBSP; ALTIMETER READS CORRECTLY. (FOUND NR 2 CADC AT FAULT. REPLACED NR2 CADC IAW MM 34-12-01. ALL REQUIRED CHECKS ACCOMPLISHED AND SYTEM CHECKS NROMAL IAW MM.)