On August 19, 2009, a Boeing 737-236, registration number HC-CFD, experienced a thrust reverser separation from the No. 1 (left) engine, a Pratt & Whitney JT8D-17A turbofan, after touchdown runway 15 and thrust reverser deployment at the Coca - Aeropuerto Francisco de Orellana Airport (OCC) Coca Ecuador. The pilot reported that after touchdown, the thrust reversers were deployed, a vibration was felt, and the airplane yawed to the right. The thrust reversers were stowed and the airplane was brought back to the runway centerline. The airplane was taxied to the gate and no engine or airplane cockpit alert indications were reported. An examination of the airplane revealed that the No. 1 thrust reverser was missing and was recovered near the runway. Thrust reverser parts sent to the NTSB metalurgy laboratory and showed evidence of fatigue fractures circumferential around the tailpipe duct. This investigation is under the jurisdiction of the government of Ecuador. Further information pertaining to this incident may be obtained from: Dirección General de Aviación Civil Departamento de Seguridad de Vuelo Buenos Aires 149 y Av. 10 de Agosto Casilla 2077 Quito Ecuador Tel.: (593) 2-544-274 Fax: (593) 2-563-995 AFTN: SEQUYAX Telex: 22710 DACUIO ED This report is for informational purposes only and contains only information obtained for, or released by, the government of Ecuador.