While IMC at FL390 both B737-700 engine eec's faulted; the first officer's airspeed and altimeter dr...

Attributes
ACN	1279484
Time
Date	201507
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Pitot/Static Ice System
Person 1
Function	Captain
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Procedural FAR Inflight Event / Encounter Weather / Turbulence

Narrative:

The following occurred in order at fl 390 in IMC conditions:1. IAS disagree (first officer IAS showed 100 KIAS. Captain HUD and standby all normal)2. Engine one and two eec faults3. Altimeter disagree (first officer altimeter off by 450'. Captain HUD and standby all normal)we completed all three QRH checklists in the order of occurrence. At the time of the event we were IMC. Upon completion of all QRH checklists; we were VMC and the first officer's IAS and altimeter returned to normal. Dispatch was notified via ACARS.I am filing this report because we never notified ATC of altimeter error in rvsm airspace (due to being preoccupied with the three QRH checklists and the fact that the first officer's altimeter returned to normal).

Original NASA ASRS Text

Title: While IMC at FL390 both B737-700 engine EEC's faulted; the First Officer's airspeed and altimeter dropped while the Captain's instruments remained normal. When VMC conditions returned; the faults were removed.

Narrative: The following occurred in order at FL 390 in IMC conditions:1. IAS disagree (First Officer IAS showed 100 KIAS. Captain HUD and Standby all normal)2. Engine one and two EEC faults3. Altimeter disagree (First Officer altimeter off by 450'. Captain HUD and Standby all normal)We completed all three QRH checklists in the order of occurrence. At the time of the event we were IMC. Upon completion of all QRH checklists; we were VMC and the First Officer's IAS and altimeter returned to normal. Dispatch was notified via ACARS.I am filing this report because we never notified ATC of altimeter error in RVSM airspace (due to being preoccupied with the three QRH checklists and the fact that the First Officer's altimeter returned to normal).

Data retrieved from NASA's ASRS site 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.

While IMC at FL390 both B737-700 engine eec's faulted; the first officer's airspeed and altimeter dropped while the captain's instruments remained normal. When VMC conditions returned; the faults were removed.