Accident Vickers 798D Viscount XA-SCM,

ASN Wikibase Occurrence # 325488

Date:	Monday 27 July 1992
Time:	16:12
Type:	Vickers 798D Viscount
Owner/operator:	Aero Eslava
Registration:	XA-SCM
MSN:	392
Year of manufacture:	1958
Total airframe hrs:	17213 hours
Engine model:	Rolls-Royce Dart 510
Fatalities:	Fatalities: 4 / Occupants: 4
Aircraft damage:	Destroyed, written off
Category:	Accident
Location:	30 km E of Mexico City-Benito Juárez International Airport (MEX) - Mexico
Phase:	Approach
Nature:	Ferry/positioning
Departure airport:	Puebla/Huejotzingo Airport (PBC/MMPB)
Destination airport:	Mexico City-Benito Juárez International Airport (MEX/MMMX)
Investigating agency:	SCT
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
Flew into a mountain (Cerro Xocotlihuipa) at 10130 feet . The aircraft had been cleared to descend from FL150 to FL120 because of severe turbulence at the initial cruising altitude. Weather was bad with rain and poor visibility.
The investigation revealed that the first officer was not certified to act as a pilot on the Vickers Viscount.

Probable cause: Impact with terrain due to not maintaining the altitude set by the control center - Mexico of 12000 feet, during an instrument approach (IFR), to the international airport of Mexico City.

Accident investigation: