As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LHR - MAINTENANCE REPORTED LOW PRESSURE FOR THE R3 DOOR. MEL 23-73-02E WAS ASSIGNED. FURTHER TROUBLESHOOTING ON 12/24/08 BY PHL MAINTENANCE PER TSM 25-62-00-810-801, PER STEP 3B(3)(A), FOUND THE R3 DOOR SLIDE AT FAULT. REMOVED AND REPLACED SLIDE PER AMM 25-62-42-04. CHECKS OK. CLEARED MEL 23-73-02E.