fredag 20. mai 2016

Chinese approaches - Curt Lewis video

Incident: China Southern B738 at Wuhan on Feb 25th 2013, collided with NDB antenna on approach but managed to climb away

A China Southern Boeing 737-800, registration B-5192 performing flight CZ-3367 from Guangzhou to Wuhan (China), was on a NDB/DME approach (minimum 1200 meters visibily required, MDA 430 feet) to Wuhan's runway 04 in visibility of 1500 meters occasionally reduced to 1200 meters in light rain and light fog and cloud ceiling 690 feet. The aircraft had been configured for landing before reaching the final approach fix and was maintaining 1800 feet when the aircraft reached the final approach fix at the outer marker 5.1nm before the runway threshold. The aircraft descended with the captain being pilot flying, when descending through 1000 feet the captain disengaged the autopilot. When the aircraft reached 430 feet there was no visual contact with the runway, the first officer called for level flight, reset the flight director and selected the go-around altitude into the master control panel. Still no approach lights were seen, the aircraft appeared low. A ground proximity warning "too low" activated, the first officer called for a go-around without response from the captain, another GPWS "too low" sounded, this time the captain called "go-around" and initiated the go-around, unusual sounds however occurred while the aircraft was still rotating up and it became obvious the aircraft had hit obstacles, but the aircraft climbed out to safety. The crew subsequently decided to divert to Hefei for a landing without further incident.

The event became known through rumours that surfaced on China's Weibo service (similiar to Twitter) in February and got confirmed by a preliminary report by China's Civil Aviation Authority (CAAC) on Mar 5th 2013.

The CAAC reported that the aircraft sustained damage (penetrations and dents) to the left main gear door and left main gear gear proximity cover actuator, the left main gear outboard tyre received cuts. The antennas of the southern NDB "D" and inner marker were damaged, two other antenna pillars were damaged as well. The CAAC annotated that the approach was continued below MDA without necesssary visual reference putting the aircraft below the approach profile, in addition the crew did not initiate the go-around after the first ground proximity alert.

http://avherald.com/h?article=45eb3067&opt=0




Incident: China Eastern A320 at Wenzhou on Mar 20th 2011, clipped trees on approach

The crew of a China Eastern Airlines Airbus A320-200, registration B-2400 performing flight MU-5577 from Shanghai Hongqiao to Wenzhou (China), had prepared for an ILS/DME runway 03 approach to Wenzhou based on ATIS broadcast. Upon initial contact with Wenzhou approach the crew was told however that winds had changed and runway 21 was now in use, the aircraft was subsequently cleared for the VOR/DME approach to runway 21. On tower the crew was reminded by tower that their minimum descent altitude (MDA) was 120 meters/394 feet (116 meters/381 feet AGL). Upon reaching MDA the crew had visual contact with the runway established, continued the approach still on autopilot and descended below MDA, but then lost visual contact. At the 50 feet call by GPWS both crew were able to see the ground but did not see the runway, the first officer called go-around twice, the captain disengaged the autopilot and initiated a go-around at around 12:10L (04:10Z). The airplane climbed out, positioned for another approach and landed safely.

A post flight inspection found scratch marks on the right main landing gear, slats and flaps of right main wing and the inlet of the right hand engine (CFM-56). An inspection of the right hand engine revaled damage (dents sized up to 0.2 mm) to all 36 fan blades, scratch marks (13cm in length) at and twigs embedded in the oil discharge.

Following cleaning, thorough examination of the airframe, borescopic inspection and repairs of the right engine the aircraft was able to return to service 6 days later.

China's Civil Aviation Authority (CAAC) reported that a low level cloud bank with cloud ceiling at 90 meters/295 feet MSL was moving inland from the sea causing the visibility to drop below 2000 meters. The autopilot was disconnected at an altitude of 104 feet (radar height 38 feet) and a go-around initiated, the radar height reduced to 10 feet until the airplane began to climb again. The CAAC said, that the crew did not immediately discontinue the approach after losing visual reference but tried their luck by continuing on autopilot until the "50 feet" call, only then the go-around was initiated. Due to the late decision by the crew the right hand wing, right hand engine and right hand main gear impacted and clipped treetops outside the airport perimeter. An investigation of the serious incident is under way.

No Metars are available.

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