ATC Recording - TR2638 Emergency Landing: Fallen Engine Cowling, Unsafe Gear Warning

A Tigerair Airbus A320-200, registration 9V-TRH, performing flight TR2638 (TGW2638) from Singapore to Chennai (India) with 183 people on board, was climbing out of Singapore's runway 02C in night conditions when passengers informed cabin crew, that parts of cowling of the left hand engine (IAE V2527) had disappeared. The cabin crew informed the flight crew, following which the flight crew stopped the climb at FL100 and decided to return to Singapore advising ATC that both engines were fully operative.
The aircraft entered a hold at 4000 feet for about 10 minutes while the crew worked the related checklists. While on approach to runway 02C the crew reported an unsafe gear indication, climbed back to 4000 feet, declared Mayday and entered another hold at HOSBA to work the checklists, then performed a low approach to Singapore Changi Airport's runway 02C about 105 minutes after aborting the first approach, ground personnel reported all gear struts were down and appeared to be in position. The aircraft positioned for another approach to runway 02C and landed safely about 12 minutes after the low approach, at 2319h.