# Incident 20110927021349I: Boeing 737-7H4, Detroit, MI, September 27, 2011

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: September 27, 2011, 08:32 local time
- Place: Detroit, MI
- Airport: Detroit Metropolitan Wayne Cou
- Damage: No damage
- Phase of flight: Cruise/Level Flight
- Operating rules: Air carrier (Part 121)
- Operator: SWAA
- Location: 42.2138° N, 83.3538° W: Placed by OpenAirDocs at Detroit Metropolitan Wayne County Airport (DTW), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.2138&lon=-83.3538&mi=10
- Aircraft: N704SW, a cancelled registration (https://openairdocs.org/deregistered/N704SW-2025-01-30) (OpenAirDocs)
- Registry model: Boeing 737-7H4 (registry code 1384404, https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Registry engine: CFM International CFM56 series (registry code 13802, https://openairdocs.org/engine/cfm-international-cfm56-series) (OpenAirDocs)
- Reported make and model: BOEING 737-7H4
- Reported engine: CFM INTL. CFM56 SERIES
- People aboard: 31
- Fatal injuries: 0
- Other injuries: 0
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20110927021349I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

SOUTHWEST AIRLINES' FLIGHT 2024, A BOEING B737-7H4, ENROUTE FROM CHICAGO MIDWAY AIRPORT (MDW) TO BALTLMORE/WASHINGTON INTERNATIONAL (BWI) EXPERIENCED A SYSTEM FAILURE WHILE IN CRUISE. CAPTAIN'S (CA) INDICATED AIR SPEED (IAS) DISAGREED WITH FIRST OFFICER'S (FO) IAS. AIRCREW DETERMINED CA INDICATION ERRONEOUS. THUNDERSTORMS AND RAIN IN AREA. CA DECLARED AN EMERGENCY AND DEVERTED INTO DETROIT METROPOLITAN WAYNE COUNTY AIRPORT (DTW) WHERE THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED A BITE (BUILT-IN-TEST-EQUIPMENT) OF THE FLIGHT COMPUTER IN ACCORDANCE WITH THE FAULT ISOLATION MANUAL (FIM) FC 31-65060 AND CONFIRMED THE FAULT. MAINTENANCE FOUND EXCESSIVE MOISTURE IN THE CA (LEFT) PITOT/STATIC SYSTEM. MAINTENANCE DRAINED AND FLUSHED THE SYSTEM AND PERFORMED LEAK AND OPERATIONAL TESTS USING MAINTENANCE TASK (MT) CARD MT-34-11-00. SYSTEM TESTED NORMAL AND THE AIRCRAFT WAS RETURNED TO SERVICE.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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