HONOLULU — A former B-2 stealth bomber engineer accused of spying for China suffers from narcissistic personality disorder, expert witnesses for the prosecution and the defense testified in federal court Thursday. But the forensic psychologists who evaluated Noshir Gowadia of Maui disagreed during the hearing over whether he is competent to stand trial and assist in his defense. Gowadia, who worked for years on highly classified military systems, has been held without bail since his 2005 arrest on suspicion of selling cruise missile secrets. He has pleaded not guilty to 21 counts of conspiracy, money laundering and falsifying tax returns. The charges against Gowadia also assert that he offered to sell classified stealth technology to foreign businesspeople in Israel, Germany and Switzerlan.